• LAN Topologies(Physical)
  • Bus topology
  • Disadvantages of Bus topology
  • Ring topology
  • Token Passing
    		•

    Network Topologies




    Download 2,5 Mb.
    bet1/7
    Sana24.12.2023
    Hajmi2,5 Mb.
    #127796
      1   2   3   4   5   6   7
    Bog'liq
    Chapter 4 Network Topologies

    Network Topologies

    • LAN topologies
    • WAN topologies

    LAN topologies

    • Physical
    • Logical
      • Describes the possible connections between pairs of networked end-points that can communicate

    LAN Topologies(Physical)

    • Bus
    • Star
    • Ring
    • Switched
    • Daisy chains
    • Hierarchies

    Bus topology

    • All networked nodes are interconnected, peer to peer, using a single, open-ended cable
    • Both ends of the bus must be terminated with a terminating resistor to prevent signal bounce

    Bus topology

    Advantages of Bus topology

    • Easy to implement and extend
    • Well suited for temporary networks that must be set up in a hurry
    • Typically the least cheapest topology to implement
    • Failure of one station does not affect others

    Disadvantages of Bus topology

    • Difficult to administer/troubleshoot
    • Limited cable length and number of stations
    • A cable break can disable the entire network; no redundancy
    • Maintenance costs may be higher in the long run
    • Performance degrades as additional computers are added

    Ring topology

    • started out as a simple peer-to-peer LAN topology
    • Each networked workstation had two connections: one to each of its nearest neighbors
    • Data was transmitted unidirectionally around the ring
    • Sending and receiving of data takes place by the help of TOKEN

    Token Passing

    • Token contains a piece of information which along with data is sent by the source computer
    • This token then passes to next node, which checks if the signal is intended to it

    Download 2,5 Mb.
      1   2   3   4   5   6   7




    Download 2,5 Mb.