Which cell does Asynchronous Transfer Mode (ATM) use?

Q.  Which cell does Asynchronous Transfer Mode (ATM) use?
- Published on 19 Oct 15

a. Bridges
b. Switches
c. Routers
d. Hubs

ANSWER: Switches
 

    Discussion

  • Prajakta Pandit   -Posted on 16 Oct 15
    Switches :

      - Switches are used to broadcasting the frames everywhere, a switch actually checks for the destination MAC address and forward it to the relevant port to reach that computer only.

      - A switch is a device in a computer network that electrically and logically connects with other devices.

      - Each network device connected to a switch can be identified using a MAC address.

      - Why an ATM uses a Switch?

      - Switch increases the security and efficiency of the network.

      - Switches use ATM mode to support two primary types of interfaces : UNI and NNI.

      - The UNI (User-Network Interface) connects ATM end system such as hosts and routers to an ATM switch.

      - The NNI (Network-Network Interface) connects two switches.

      - An ATM network consists of a set of ATM switches interconnected by point-to-point ATM links or interfaces.

    Hubs :

      - Hubs are special repeaters that overcome electromechanical limitations of a media signal path.

      - Hubs are used to build networks means they build a LAN by connecting different computers in a star or hierarchical network topology.

      - It requires a central location to bring media segment together.

      - Hubs have two main types -

        1. Passive
        2. Active

      1. Passive :
        - A passive hub combines the signals of network segments but there is no signal regeneration. The signal is forwarded as it is so it doesn't need power supply. It reduces the cabling distance and also with a passive hub, all computer receives the signal sent from all other computer.

      2. Active :
        - The signal is amplified so they work as repeaters. It also called as multiport repeater. And they require a power supply.

        - Hubs can be connected to other hubs using an uplink port to extend the network.

    Bridges :

      - Bridges are used to extend networks by maintaining signals and traffic.

    Routers :

      - Routers are used to connect different LANs or a LAN with a WAN (eg. the Internet).

      - If a packet destination is on a different network, a router is used to pass it the right way, so without router the Internet would not perform.

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