assalamualaikum.....
today is 19/03/2012....
our first class after our semester break... and our lecture, Pn. Rahimah give us some work to do and that is advantages and disadvantages of network topology.... this is little about topology...

What is a network topology? In communication networks, a topology is a usually schematic description of the arrangement of a network, including its nodes and connecting lines. There are two ways of defining network geometry: the physical topology and the logical (or signal) topology.
The physical topology of a network is the actual geometric layout of workstations.
 ( i take it from internet)..

Star Network

-Advantages

• Good performance
• easy to set up and to expand. Any non-centralised failure will have very little effect on the network, whereas on a ring network it would all fail with one fault

-Disadvantages

• Expensive to install
• Extra hardware required

Ring Network

-Advantages

• Data is quickly transferred without a ‘bottle neck’. (very fast, all data traffic is in the same direction)
• The transmission of data is relatively simple as packets travel in one direction only.
• Adding additional nodes has very little impact on bandwidth

-Disadvantages

• Data packets must pass through every computer between the sender and recipient therefore this makes it slower.
• If any of the nodes fail then the ring is broken and data cannot be transmitted successfully.
• It is difficult to troubleshoot the ring.

Bus Network

-Advantages

• Easy to implement and extend
• Well suited for temporary networks (quick setup)
• Initially less expensive than other topologies
• Cheap

-Disadvantages

• Difficult to administer/troubleshoot.
• 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.

and i give you some image of network topology....

this is the image for star network topology.... =)

this one is the image for ring network topology..=)

 

this is bus network topology.. =)

 so,, i hope that you will know about topology network and understands how it work... =)  

okay... thats all for today... take care =)

   ~Philosophy is a study that lets us be unhappy more intelligently~

and thinking out of the box okay... =)