• Types of computer network with example

    Types of computer network

    LAN(local area network)



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    local area network



    A local area network is a computer network that connects multiple devices to each other and shares data within a limited small area like school, University, Offices, etc.

    • -It's easy to design and implement.
    • -The local area network provides high-speed data transmission.
    • -Less congestion under the local area network.
    • -More tolerant occur in the local area network.
    In the local area network using Ethernet, it provides 10 Mbps high-speed connection and fast Ethernet provided 100 Mbps and gigabit Ethernet provides 1000 Mbps connection speed.

    Users can mainly use the local area network to communicate with each other by sending e-mail or chat sessions.


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    PAN(personal area network)

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    personal area network


    Personal area network can be used for communication among the personal devices. A personal area network is a computer network for interconnecting many gadgets such as a computer, laptops, smartphones, tablets, printers, etc.
    Personal area network can be wireless or carried through wired such as USB and firewire. Both are wired personal area network and Bluetooth is a type of WPAN.

    Wireless personal area networks generally cover a distance of around 10 meters (32 feet). A personal area network your own personal devices can interconnect through the internet very secure and easier communication and data transmission.

    WLAN(wireless local area network)

    A wireless local area network allows devices to connect and communicate to form a local area network within a limited small area.
    In wireless local area network data is transmitted over the air using one of Wi-Fi 802.11 protocols.

    Wireless local area network is provided many limited physical ports on the router and therefore multiple devices connected. The range of wireless local area networks can easily be extended by adding more repeaters.

    CAN(controller area network)

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    controller area network

     It is used for communication among different devices in a low radius region. It was developed by Robert Bosch in 1982.

    Five-layer are consider in controller area network:-

    *-Application layer:- It interacts with operating system or controller area network devices.
    *-Datalink layer:- It connects the devices and sending, receiving, and validating data.
    *-Physical layer:- It represents the hardware of controller area network devices.
    *-Transfer Layer:- This layer responsible for bit timing, message framing, acknowledgment , error detection, etc.
    *-Object layer:- --Message filtering
                       --Message and status handling.

    MAN(metropolitan area network)

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    metropolitan area network

    The metropolitan network covers a larger area as compared to a local area network. But smaller than a wide area network. It is also used to interconnect many different local area network with backbone line.
    The metropolitan area network is designed for customer and covers a large geographical area and may serve as an internet service provider.

    • -It is difficult to design and maintain.
    • -Moderate speed available in the metropolitan area networks.
    • -Less Tolerant in the metropolitan area network.
    • -More congestion occurs in metropolitan are network.
    • -It mainly used in Small towns and city.-=

    WAN(wide area network)

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    wide area network

    Wide area a network that extends over a large geographical area such as across cities, states or countries. They can be more public to Connect the smaller network together.
    The internet is a wide area network because through the use of internet service provider it connect multiple small local area networks or metropolitan area networks?
    • -It is difficult to design and maintain.
    • -It provides low transmission speed.
    • -Less Tolerant in the wide-area network.
    • -More congestion occurs in a wide area network.
    • -It used to connect to many countries.

    SAN(storage area network)

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    storage area network

    A storage area network is a high-speed network that provides block-level network access to storage. A LUN(Logical disk unit) is a range of blocks provisioned from shared storage and presented to the server as a logical disk.
    The storage area network doesn’t provide file abstraction only block-level operations.
    The storage area network mainly used to increase the accessibility of storage devices such as disk array.

    VPN(a virtual private network)

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    virtual private network


    It is provide a point-to-point connection between two machines or networks over a public network. An application running across a virtual private network may benefit from the functionality, security, etc.

    Encryption and Decryption technique also is used in virtual private network technology.
    A virtual private network clients use TCP/IP protocol(transmission control protocol/internet protocol) which is called tunneling protocol. The tunneling protocol used to tunnel the traffic.

    Types of VPN(a virtual private network):-

    1-Remote access VPN:-
    There is requirement two components in remote access.
    Network access server.
    Client software.

    2-Internet VPN
    If we use intranet VPN than it reduces the wide-area network bandwidth cost.
    The intranet VPN connect different VPN router from a different-different place or network provider.

    3-Extranet VPN
    This VPN the facility used for e-commerce.
    It allows all of the companies to work in a shared environment.
       



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