Network Types - CompTIA A+ 220-1101 - 2.7

00:04:24
https://www.youtube.com/watch?v=lYIYcP4DSp8

概要

TLDRThe video covers different types of networks, including Local Area Networks (LAN), Wide Area Networks (WAN), Personal Area Networks (PAN), Metropolitan Area Networks (MAN), Storage Area Networks (SAN), and Wireless Local Area Networks (WLAN). It explains that LANs are used for devices within a limited area, usually offering high bandwidths via technologies like Ethernet and Wi-Fi. WANs connect devices over longer distances and typically have slower speeds. PANs facilitate communication between personal devices, often using Bluetooth. MANs connect multiple locations within a city, while SANs focus on high-speed access to centralized storage. WLANs are used for wireless connections within a building, often requiring additional access points to extend their range.

収穫

  • 🌐 **LAN**: Local network for devices close to each other.
  • 🌍 **WAN**: Used for long-distance communications.
  • 📶 **PAN**: Connects personal devices like earbuds.
  • 🏙️ **MAN**: Links multiple sites in a city.
  • 💾 **SAN**: Centralized high-speed storage access.
  • 📡 **WLAN**: Wireless network for localized areas.
  • 🔌 **Ethernet**: Common LAN technology.
  • 📶 **802.11**: Standard for wireless local area networks.
  • 🧩 **High Bandwidth**: Essential for efficient communication.
  • 📱 **Bluetooth**: Common in PAN connections.

タイムライン

  • 00:00:00 - 00:04:24

    本视频介绍了不同类型的网络及其特点。首先，局域网（LAN）通常指在同一建筑或附近建筑内的设备，具有高带宽，常见的技术有以太网和802.11无线网络。相对而言，广域网（WAN）连接了远距设备，速度较慢，常通过点对点串行连接、MPLS等技术实现。个人区域网（PAN）常见于Bluetooth或红外连接，方便设备之间的小范围通讯，比如无线耳机与手机的连接。大城市内的多个地点通常通过城市局域网（MAN）连接，相较于LAN更远，但不及WAN，常见的实现方式为Metro Ethernet。存储区域网（SAN）提供了集中存储功能，允许对大容量数据块的高效读写，同时需要高带宽支持。最后，无线局域网（WLAN）广泛使用于小范围内的无线通讯，802.11是常用的无线技术，通常需要额外的接入点来扩展无线网络的覆盖范围。

マインドマップ

ビデオQ&A

  • What is a LAN?

    A LAN is a Local Area Network, typically used for connecting devices within a building or nearby buildings.

  • What technologies are commonly used in LANs?

    Common technologies include Ethernet and 802.11 wireless networks.

  • What is a WAN?

    A WAN is a Wide Area Network, used for connecting devices over long distances, such as between cities or countries.

  • What connects devices in a PAN?

    Devices in a PAN can be connected using Bluetooth, infrared, or NFC.

  • What is a MAN?

    A Metropolitan Area Network connects multiple sites within the same city or geographical area.

  • What is a SAN?

    A SAN is a Storage Area Network that provides centralized storage access with high speeds.

  • What technology is used for WLAN?

    WLAN typically uses 802.11 technology for wireless connections within a localized area.

  • How is bandwidth different in LAN compared to WAN?

    LANs usually have higher bandwidths compared to WANs due to shorter distances.

  • What might you use PAN for?

    PAN is often used for connecting personal devices like wireless headsets or smartphones.

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オートスクロール:
  • 00:00:02
    a lan is a local area network and
  • 00:00:04
    although local is a relative term this
  • 00:00:06
    usually means devices that are in your
  • 00:00:08
    building or a group of buildings that
  • 00:00:10
    are nearby because these devices are
  • 00:00:12
    local to you usually we have very high
  • 00:00:15
    bandwidths to be able to communicate to
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    those devices the networks providing
  • 00:00:19
    these high bandwidths usually are
  • 00:00:21
    ethernet networks and 802.11 wireless
  • 00:00:24
    networks if you're using a slower
  • 00:00:26
    network connection than what these two
  • 00:00:28
    can provide then you're probably not on
  • 00:00:31
    a local area network
  • 00:00:33
    if you're communicating to a location
  • 00:00:35
    that is in another city another country
  • 00:00:38
    or somewhere else around the world then
  • 00:00:40
    you're communicating over a wan or a
  • 00:00:42
    wide area network
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    because of the distances involved in
  • 00:00:46
    getting that signal from one location to
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    another over such a long distance these
  • 00:00:51
    speeds are usually slower than what you
  • 00:00:53
    might find on a local area network and
  • 00:00:56
    there are many different ways to
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    accomplish this this could be over a
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    point-to-point serial connection it
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    could be through mpls or many other
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    types of wide area network technologies
  • 00:01:07
    sometimes these wide area networks are
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    connected with fiber that's in the
  • 00:01:10
    ground or you may be communicating to
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    another location through a
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    non-terrestrial or satellite link
  • 00:01:17
    if you've ever connected your phone to a
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    pair of wireless earbuds then you've
  • 00:01:20
    used a personal area network or a pan
  • 00:01:24
    these pan networks can be many different
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    technologies you might be using
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    bluetooth which is very common when
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    connecting these earpods or you might
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    use infrared or nfc connections these
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    are very common in automobiles where
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    you're connecting your mobile phone to
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    the audio system that's in your car or
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    your truck
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    and you may be able to integrate other
  • 00:01:41
    applications such as your map or your
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    contact list
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    connecting your wireless headset is
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    probably one of the most common ways to
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    connect a personal area network and if
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    you're working out you may be able to
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    use a personal area network to
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    communicate directly to the equipment
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    and it's very common to create reports
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    based on this workout telemetry that
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    you've been able to acquire using your
  • 00:02:01
    personal area network
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    if you work for a company that has many
  • 00:02:05
    locations within the same city or
  • 00:02:07
    geographical area you may be connecting
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    those sites together using a
  • 00:02:12
    metropolitan area network or a man the
  • 00:02:15
    distances you would need to communicate
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    to these sites are much longer than what
  • 00:02:19
    you would find with a local area network
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    but not as far as what you would find
  • 00:02:23
    with a wide area network this middle
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    range of a metropolitan area network is
  • 00:02:28
    usually with locations that are in the
  • 00:02:29
    same city
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    although in the past there have been a
  • 00:02:32
    number of different topologies that
  • 00:02:33
    would connect these sites within the
  • 00:02:35
    same city today we commonly see metro
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    ethernet where you're given an ethernet
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    connection on both sides and the service
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    provider provides the link between those
  • 00:02:44
    locations metropolitan area networks
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    tend to be very common for governments
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    because they already have the right of
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    way to be able to put conduit in the
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    ground and extend fiber connections
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    between all of their remote sites
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    we're very accustomed to saving loading
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    and changing files that are on the local
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    drives of our computer but there are
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    ways to extend those drives to a
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    centralized form of storage called a
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    storage area network or a san asan is a
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    high-speed network that allows us to
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    communicate to a centralized storage
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    facility usually one with a very large
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    capacity this provides block level
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    access which is very similar to the
  • 00:03:22
    block level access we have on our local
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    storage devices which means it's very
  • 00:03:26
    efficient to read and write to that sand
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    but even with these efficiencies you may
  • 00:03:32
    still be sending very large files and
  • 00:03:34
    retrieving large files from this storage
  • 00:03:36
    area network because of that there are
  • 00:03:38
    usually very high bandwidths required to
  • 00:03:40
    be able to communicate to these sands
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    and they're often isolated on their own
  • 00:03:45
    high-speed networks
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    and if you're communicating wirelessly
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    to a network that's in your building
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    you're probably using an 802.11 network
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    on a wireless local area network or wlan
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    these wireless networks don't have a
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    very large range so you often see them
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    used inside of a building or a localized
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    area if you needed to extend beyond
  • 00:04:04
    those distances then you would usually
  • 00:04:06
    add additional access points to be able
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    to extend the total size of the wireless
  • 00:04:12
    local area network
タグ
  • LAN
  • WAN
  • PAN
  • MAN
  • SAN
  • WLAN
  • Ethernet
  • Wireless
  • Network Types
  • High Bandwidth