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[Music]
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hi grade 11s and welcome to our term two
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revision where i'm looking at the theory
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modules that we covered this term so i'm
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just briefly gonna go go through
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everything um so this would just be a
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nice overview
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for you okay so let's get started and
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let's have a look at what we needed we
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started with module 1.3 we were talking
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about storage memory and processing
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so please remember
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right please remember this when we talk
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about the specs of the pc now
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i'll be asking things like what's the
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primary memory and the secondary memory
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please remember your primary memory
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we're talking about ram
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and that's what they show in here it's 1
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to 16 gigs
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well it's obviously bigger than that now
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or you can have more than that and then
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your storage your secondary memory yeah
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we talk about you know more gigs we talk
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about terabytes as well so primary
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memory ram secondary memory our hard
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drive okay
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let's move on there we've got our memory
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and storage again at this stage we know
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the difference between
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memory and storage so please
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go through that
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this is going to become an integral part
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where we start throwing adverts in spec
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lists of pcs so that you can understand
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and let us know that you understand what
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you are reading
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so there for example is the memory look
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at the top an atx case and psu that's
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your power supply unit what this is
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telling me is that there's a physical
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case a physical tower with a power
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supply unit so is it a laptop or a
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desktop it's a desktop
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then i've got my motherboard i've got
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the model of the cpu i've got my
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secondary memory my primary memory my
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optical
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drive
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okay
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my operating system
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and the version of it
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i've got a physical keyboard and mouse
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and a 18.5 inch member we measure that
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diagonally in inches
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lcd liquid crystal display screen
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okay so there they show us
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just an example also of an external
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drive and then we have online storage
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again storing files online so we can
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access it anywhere we need to provided
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we have an internet connection
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so they go through some of the
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advantages
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and disadvantages again as i always say
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you should know just at least two of
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them you should be able to explain the
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concept of online storage
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and be able to give us two
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examples or two advantages and two
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disadvantages and that should that
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should sort of cover you
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okay so please do make some time and go
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through these things
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then the difference between your online
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storage and cloud computing now online
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storage differs from cloud computing as
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they're telling us because it involves
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storing files so online storage i'm
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storing files onto the cloud online
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that's what i'm doing
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okay
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um
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whereas cloud computing i'm actually
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using
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you know programs that based on the
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cloud so
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if i've got a version of office
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that i need to connect to the internet
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in order to actually use that that would
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be an example of my cloud compute i'm
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actually running things from the cloud
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then with backing up but now we know
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what backups are we are making a copy of
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our files why because files can get
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damaged corrupted deleted
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so
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just bear that in mind as well there are
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a couple of popular backup strategies i
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can use cds dvds blu-rays flash drives
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portable hard drives and
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obviously my online
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storage as well now they go through the
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process of how to write cds and dvds i'm
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not going to worry too much about that
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because they don't really ask you
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for that this is something that they do
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ask the difference between a backup and
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archive now backup is when i'm making
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another copy archiving i'm actually
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moving those files somewhere else to use
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at a later stage okay
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then we start you know you'll see this
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we start talking about troubleshooting
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what do we do with problems arise so
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managing backups problems with cds disk
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scanning
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please start to know these things
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because it does play a big role in grade
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11 and grade 12.
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okay so you can go through that then
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processing we know what processing is
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and the role it plays
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um we know how what our motherboard is
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largest circuit board everything else is
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plugged into our cpu that does the
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process in our ram with the cpu goes to
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fetch the instructions and data that it
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needs to work on and our rom that holds
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instructions when it comes to the basic
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hardware of the computer you know when
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the computer switches on it's got all
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those instructions
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in there
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now this is important to know because
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they'll ask you to describe the booting
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process so when a computer starts itself
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up you click on the start button and
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your rom instructions then begin to load
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it checks what the cpu and then the boot
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processing begins you know uh when you
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switch pc on
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and i know some of them do that beep
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like dude that's when rom has checked
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through everything motherboard hardware
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ram everything is okay
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dude
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let's go
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and then the booting process goes and
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this is why it moves in from a black
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screen a black and white screen to the
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windows logo because it looks for the
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hard drive
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where's the operating system installed
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and then it loads the operating system
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okay so there you can see checks all of
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that and then loads the operating system
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then the next one was dealing with your
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local area networks now in grade in the
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grade 10 revision video you saw we
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started
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on just what a network is now we're
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going to some more detail we already
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know what a network is so i don't even
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have to go into that definition
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um we know what that is we know what a
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local area network is it's a network
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confined to a
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specific geographical area one
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geographical area like your school or
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your building or things like that then
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you have your wlan which is a lan but
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wireless
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okay and they will ask you for the
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difference between the two and why you
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would use a wireless lan or what the
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advantages of using the wireless lan
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would be as opposed to a normal
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cable glance please remember a cable
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connection is always going to be faster
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and more stable than your wireless so
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just just bear those things in mind
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also your intra i'm
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please it's not internet this is an
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intranet
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sorry i must say it like that
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this is an organization accompanies
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private network it has an internet like
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environment in other words i can open up
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a website i can go to the company's
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website click in there put in my
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username and password and i'll navigate
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as i would
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you know when i browse the internet but
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it is only within my company's
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organization so if i go home i can't
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access it
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because i need to be connected to the
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company's network and many times you
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have got to go through
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a vpn to be able to access these things
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so and just know the difference between
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those also the difference between your
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workstation and your server your client
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computer and your server client computer
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workstation is going to be the same
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thing your server provides services to
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the network your clients connect to the
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server um to benefit from those
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then some of the basic components of the
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network i know i had a video showing you
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in in the class maybe i'll just do an
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updated one
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your network interface controller that's
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your network card
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that device is there
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to allow the pc to connect to the
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network so you've got your physical
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network cable that gets plugged in
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a physical network cable gets plugged
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into the actual
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network card and that is how it's able
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then to communicate please know the
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difference between that and a switch the
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switch is a hardware device that as it's
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saying connects computers in a network
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right so that they can communicate
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now you might have two or three computer
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labs
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or you your entire school might have a
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network
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and the switch allows one area to
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connect to another one so that
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communication can
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uh occur also your data transmission
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speeds in other words how fast data can
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move over that cable
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these are questions that come up often
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i know this came up in the previous in
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june's exams
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so
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please
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when you see 10 100 1000 what that means
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it's the minimum speed and the maximum
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speed that that cable can handle so if
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it says 10 100 means it can handle up to
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100 megabits per second of data
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transmission
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on that line okay
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also bear in mind
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and they will ask you this
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if all my devices my network card
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because remember when i set up a network
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i need a network card i've got a cable
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i've got a switch i've got a server with
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a network card all this if they all run
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at the same speed beautiful
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but let's say i've got cables that can
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handle 100 megabits per second but my
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network cards and my switches can only
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handle 10 megabits per second then the
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entire network
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will work on 10 megabits per second your
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network speed will be controlled
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by the slowest device on that network so
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if you want your network to run at you
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know a thousand megabits per second all
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your devices must be capable of handling
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that thousand megabits per second okay
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also your wireless standards um you know
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what does that stand for what is the g
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mean what does the n mean there they
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tell us those are things that you must
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know
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okay and then they just mention your
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wired media to your different types of
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cables these guys know how to explain
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these cables to us
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that's another tip
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oh this means the communication
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the network operating system in other
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words your operating system that has
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network capability there are some
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operating systems that don't allow you
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to connect to a network so
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um
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most of your you know your windows
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software does allow you to do that
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uh but you would need to check on that
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so again software that controls all the
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communication security in a network uh
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most have this built in as i mentioned
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um
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yeah that's that's about right so how
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would you know that you are connected to
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a network sometimes you'd see on your
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explorer that you maybe have extra
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drives
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um you might see something else other
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than you know when you click on my
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network places you might actually see
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that there are other computers there and
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you might see you know when you want to
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go and print to something oh there's you
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know a whole list of printers with
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different names you know
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to places that
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like your your library or things and
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you're like okay but i'm sitting in the
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computer lab so these are all
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just some signs that
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you are actually connected to a network
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then you want to go into the advantages
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again i'm not going to go through this i
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have done videos on this so please go
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and check that out know the advantages
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between
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your wireless and your cabled networks
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the disadvantages as well why you would
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choose one over the other because
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they'll give you a scenario and ask you
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to justify why the one is actually
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better than the other
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then your network security
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your policies please just understand
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what that is
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and how it works
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uh then they just mentioned within the
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network environment you use usernames
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and passwords obviously to keep your
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information safe
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uh
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yes this is very important
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please guys
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they will ask you about passwords and
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you might have to give an example of a
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password that would be a strong password
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a strong password should have a capital
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it should have a number it should have
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a symbol in it if you look at this
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passage look i'm gonna i'm gonna say it
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straight to you i'll never remember this
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password but it's got all the elements
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necessary for a strong password like it
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doesn't make sense
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that's the first thing it doesn't even
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make sense but it's got a capital it's
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got a number it's got a percentage right
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it's got small letters as well so that
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combination is what actually creates i'm
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a good password should be about eight
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characters
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not the name of your girlfriend or dog
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or boyfriend or anything no man this is
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why you get hacked
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so a few rules to follow at least eight
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characters as i mentioned uppercase
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lowercase numbers special characters you
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know all that type of thing don't use
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things like asdf 1234 your birthday oh
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no please yeah you are going to get act
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then the ethical use of
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networks um
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the proper way to use it a way that
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doesn't infringe on anyone else a way
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that doesn't hurt anyone else
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and this is where we have things called
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acceptable use policies your aups even
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notice when you go to mcdonald's or kfc
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and you want to connect to their wi-fi
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that they give you a certain amount of
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data for a certain period of time that's
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the acceptable use policy when you go to
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baywest and you connect or shopping
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center you connect they give you they
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don't give you unlimited data they give
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you a certain amount of data a certain
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amount of speed
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and a certain amount of time so that you
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can use it do what you need to and then
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get off
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okay
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so
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it will say you know what the user can
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do what they permitted to do and not to
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basic netiquette rules
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and it basically serves as the contract
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between the
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provider and you as the consumer
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okay so again you can go and read
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through that
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you know what should be in there
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again you don't have to know every
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single detail but you should know at
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least two or three of those
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uh then the next one was the browsing
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experience the the usability of websites
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now in grade 11 we would have started
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with html so this plays into that
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so i'm not going to spend too much time
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on that i'm just going to breeze through
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this
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you know your website should have proper
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navigation
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shouldn't be any broken links or things
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like that
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you want to use proper fonts and the
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same fonts all the way through so that
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there's consistency i mean look at this
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site it's got good fonts you know
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keeping it to a reasonable size you've
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got your menu on the side for navigation
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so all of that looks good you can see
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when they go to the next page still the
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same headings still the same menu items
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on the side the text is still more or
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less the same size
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and type so it it you know we you just
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trying to keep that consistency going
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there also your layout should be well
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designed as you saw with the others your
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typography please don't use multiple
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fonts on one website you want to make
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sure that it's easy to read not huge
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fonts
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or something too small that you're going
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to need a magnifying glass please kind
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of you know just
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think
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just think before you do this think of
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your favorite website
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even think of you know facebook and
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things like that
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you see how everything has been
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structured so it's easy to read and easy
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to go through everything
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that's how your web page should be
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okay some other factors affecting
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browsing obviously privacy you don't
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just click on everything all right
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there's things like spyway
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which is
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big big business because people want to
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know what you are looking at and what
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your friends are looking at so they can
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target you with certain adverts hoping
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that you would then buy those products
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so just know what spyware is as well
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your profile your online profile is
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based on which programs you use how
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often you use them the websites you go
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to those cookies by the way when you go
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to a website and they say accept all
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cookies and you click on them yeah
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you know it's getting your your browsing
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data okay
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just say
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just say
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adware oh this this is you know
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irritating like like really irritating
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so adway is software that just downloads
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and it bombards you with ads you just
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connect to the internet it's ad ad and
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ahead and
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so be careful of the free program sorry
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that are out there
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um and uh yeah this type of software can
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use up a lot of data so you want to have
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an antivirus software to make sure that
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you are okay
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and the last one was finding information
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again tying into those of you who are
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doing the pet in grade 11 we go from
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data to information to knowledge
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data that needs to be processed
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um
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data needs not that needs to be
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data needs to be processed to turn it
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into information that makes sense
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so we know this we have we've covered
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this in grade 10 already
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knowledge now turns inside or into
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insight when we extend this information
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by picking up patterns and gaining
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insight for example
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a shopping center allows you
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to connect to the wi-fi you know why so
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they can pick up the trend of where
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people are going to first which shops
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are more popular what's the sort of
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route people take within the shops and
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haven't you seen in
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shopping centers that they sometimes
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chop and change where the location of
00:17:20
certain shops are or where the food
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court is and things like that
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they're using you
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but
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that's what they do so that they can
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work out what the best layout is
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for you
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why so that you can spend money okay
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that's the ultimate goal of a shopping
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center they want to make money
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so here's our problem solving cycle we
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determine a strategy
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sorry we have a task definition then we
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determine the strategy we implement it
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and then we reflect
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so they talk a bit about questions the
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role of questions um i think a great
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time we spoke about the open and closed
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question as well
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we know we can
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you know these days we have an unlimited
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supply of
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resource material when i was growing up
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i remember in primary school having to
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do
00:18:12
an assignment on world war ii and i had
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to go
00:18:16
get this to the library i know some of
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you don't go there
00:18:19
but i had to go to the library to go and
00:18:21
find books then you know actually open
00:18:24
them and read them in order to extract
00:18:26
the information make photocopies and
00:18:28
things like that and then reword it uh
00:18:31
and if i was quoting you would quote
00:18:32
with appropriate sources you know
00:18:34
appropriate references
00:18:36
um and that's how i'd create my
00:18:37
assignment not this copy and paste from
00:18:40
google but we've got so much
00:18:42
more resources these days
00:18:44
then some of the data processing
00:18:46
techniques you know we use word we use
00:18:48
excel we use graphs you know all these
00:18:50
different things it's just showing you
00:18:53
what we can actually do
00:18:56
effective reporting they mention as well
00:18:59
where they talk about the report the
00:19:01
introduction you should have a main body
00:19:02
and a conclusion you want to look at
00:19:04
things like copyright intellectual
00:19:06
property correct referencing and
00:19:08
bibliography this is now when you're
00:19:10
putting everything together to present
00:19:12
this report
00:19:14
or assignment these are things we should
00:19:16
be looking at an electronic presentation
00:19:19
provides a useful quick overview and
00:19:21
summary of the report they're mentioning
00:19:23
this because in grade 11
00:19:25
for those who in the department of
00:19:26
education pet you will be doing this
00:19:28
okay so
00:19:30
please bear that in mind
00:19:32
they mentioned the information
00:19:33
management cycle again you can go
00:19:35
through this and really ask too many
00:19:37
questions on that
00:19:39
um again this is this is path related
00:19:41
the task definition what a task
00:19:42
definition is they give us a few
00:19:44
examples
00:19:46
um
00:19:48
yeah
00:19:49
really that's basically it we by now we
00:19:52
know what the task definition is the
00:19:54
types of questions the levels of
00:19:56
questions as well again this is
00:19:58
very specific to the path that
00:20:01
all of you are doing
00:20:03
okay so i'm just going to breeze through
00:20:05
that
00:20:07
these are just
00:20:08
when you busy with your questionnaire
00:20:10
when you're trying to ask questions
00:20:12
remember that that table that you would
00:20:13
be creating where you are asking
00:20:15
questions to guide your research those
00:20:18
three tables that you're supposed to
00:20:19
have
00:20:20
okay this is what would then help you
00:20:22
you could conduct a survey as well
00:20:24
because remember with your pet what's
00:20:25
going to happen is you're going to
00:20:26
conduct a questionnaire survey and
00:20:28
convert that into a spreadsheet which
00:20:30
you are going to then draw
00:20:33
information
00:20:34
from
00:20:35
so there are different ways to do
00:20:36
surveys very important because they have
00:20:39
asked in the in the question papers
00:20:40
already the difference between a
00:20:42
questionnaire and a survey
00:20:44
and why you would choose one over the
00:20:46
other
00:20:46
okay then you have your types of surveys
00:20:50
they just mentioned a few and give us
00:20:52
some details
00:20:54
that's obviously an electronic survey
00:20:56
um setting effective survey questions so
00:20:59
these could be
00:21:00
you know mentioned as tips when
00:21:03
conducting your survey or when putting
00:21:05
survey questions together what should
00:21:07
you be looking at
00:21:08
okay uh yeah that's all fine the
00:21:12
effective layout how is your survey been
00:21:14
laid out again guys you can just go
00:21:16
through this
00:21:17
i'm checking the quality of the
00:21:18
information
00:21:22
you know
00:21:23
you know they don't ask too many
00:21:24
questions on this but again
00:21:27
just go through it um you should have
00:21:29
covered this as well
00:21:31
and again this is based this is based on
00:21:36
what we've been doing okay it's based
00:21:39
off the bet
00:21:40
and yeah
00:21:41
i think that is about it sorry that i'm
00:21:44
throwing that up now
00:21:45
um let me just
00:21:49
okay so
00:21:51
that basically brings us to the end of
00:21:53
everything that was covered in term two
00:21:57
so guys if you have any other questions
00:21:59
let me know in the comments i will be
00:22:01
doing a prac on this as well
00:22:03
so that you can see the practice modules
00:22:05
that we've covered for the term but this
00:22:07
is your theory for term two
00:22:16
you
