Page 19 - DCAP406_DCAP_207_Computer Networks

Computer Networks/Networks

Notes
Figure 1.3: Ring Topology

Advantages

Broadcasting and multicasting is simple since you just need to send out one message.
Less expensive since less cable footage is required.
It is guaranteed that each host will be able to transmit within a finite time interval.
Very orderly network where every device has access to the token and the opportunity
to transmit.
Performs better than a star network under heavy network load.
Disadvantages

Failure of one node brings the whole network down.
Error detection and network administration becomes difficult.
Moves, adds and changes of devices can effect the network.

It is slower than star topology under normal load.
Generally, bus architecture is preferred over the other topologies – of course, this is a very
subjective opinion and the final design depends on the requirements of the network more than
anything else. Lately, most networks are shifting towards the star topology. Ideally we would
like to design networks, which physically resemble the star topology, but behave like bus or
ring topology.
Self Assessment

State whether the following statements are true or false:
6. A topology, which is a pattern of interconnections among nodes, influences a network’s
cost and performance.

7. There are Five primary types of network topologies which refer to the physical and
logical layout of the Network cabling.

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