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Wednesday, December 12, 2007

HYBRID TOPOLOGY

A hybrid topology is two or more topologies connected to each other to form a complete network. There are many different combinations that a hybrid can do, some of them are:
o Star – Bus o Star – Ring
Star – Bus
A star-bus topology is multiple star networks connected to each other via bus connection. All of the computers connected to each star network will have a centre piece which will either be a hub or a switch and the bus cabling will connect to the hub or switch to connect each star topology to each other.
One of the advantages of having this type of hybrid topology is that the rest of the computers in the star won’t be affected. This network is very easy to set up and is very easy to add on networks too. Adding on other networks could also cause problems, if the bus cabling is just Ethernet cable and there are alot of computers sharing information then the network could become slow and files could become corrupt or even lost. Another problem that could arise if the central hub or switch fails then that star network will not be able to communicate.
Star-Ring
A star-ring topology is multiple star networks wired to a ring connection. Again, each node within the star in this network will be connected to either a hub or a switch. If a computer goes down, then the network will still be alive compared to a normal ring topology, the whole network would go down. Because token passing is used in a ring topology, having more computers connected will not slow down the network which will allow greater traffic to be sent around the network at any one time.
source:wikipedia

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