Physical Bus topology- 10 base2 , 10 base 5. I guess 10 denotes the speed in Mbps, 2 ,5 etc are number of wires. The bus topology is quite old and no longer used. in 10 base2, the medium used is coax cable. The disadv of bus topology is that in the bis, if any one computer is down, the entire network is down.
Star topology- Ethernet using hub or concenterator. This is also called as 10BASE T network. rthernet operates at 10 mbps. fast ethernet operates at 100 mbps
Ring topology:-
1. Token Ring:- the wiring details are similar to ethernet,however the difference lies in the central device. In ethernet, it is hub, whereas in token ring it is Multistation Access unit(MAU). Token ring network operates at 4 & 16 megabits per second.
2. FDDI:- FDDI topology is similar to token ring with the exception that FDDI uses Optical fibre and some computers can be connected to more than one FDDI ring. such computers which can be connected to more than one ring are called dual homed. FDDI typically operates at 100 mbps
WANs
Two LANs can be connected to each other using routers. The connection medium can be a telephone line. The digital phone line has a speed of 56 kilobits per second. Trunk lines called T1 line has a speed of 1.5 Megabits per second. T-3 lines have higher speed of the order of 45 Megabits per second.
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