Network Topology

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Network Topology

• By Rebecca Michaela James

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Bus Network
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What is a bus network?

• A bus network is an arrangement in a local area
  network LAN in which each node (workstation or
  other device) is connected to a main cable or
  link called the bus.

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Advantages

• Easy to implement and extend
• Well suited for temporary or small networks not
  requiring high speeds (quick setup)
• Cheaper than other topologies.
• Cost effective as only a single cable is used.

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Disadvantages

• Limited cable length and number of stations.
• If there is a problem with the cable, the entire
  network goes down.
• Maintenance costs may be higher in the long run.
• Performance degrades as additional computers are
  added or on heavy traffic.
• Proper termination is required (loop must be in
  closed path).
• Significant Capacitive Load (each bus transaction
  must be able to stretch to most distant link).
• It works best with limited number of nodes.
• It is slower than the other topologies.

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Message Process

• A bus network is a passive network the message
  service works as a signal travels up and down the
  line.
• The computer looking for the signal picks it up
  if not it is terminated at the terminators.

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Cable Connections

• It has a single channel which all the nodes are
  attached to.
• It can use a co-axial cable or cat 5 which
  transmits at 10-100 Megabits per second.
• The cable is usually limited to 100 ,metres
  maximum.