Question

An electronic device used to connect different types of topologies having same protocol

1)Repeater

2)Router

3)Bridge

4)Switch

Answer 1

different types of topologies having same protocol

like ethernet with token ring...2 different lan topologies but same protocol...we can do so only with a device having network layer..
so option is b...Router......

theoretically bridge is also mentioned at someplaces but since it doesnt have network layer,fragmentation is not possible...so it cant be an option...

Comments

@sudsho any reference ?

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@saurabh rai
https://en.wikipedia.org/wiki/Bridging_(networking)... here mentioned that bridges have only first 2 layers and no network layer hence fragmentation is not possible..so we cant connect ex token ring with ethernet as max data size in ethernet is only 1500 B....we wont be abe to fragment the packet..
and routers we know it can connect different LAN topologies or similar networks but cant connect like TCP/IP with an ATM connection because here protocols at network layer are different and we need transport layer to identify them..so here then.we'll need gateway..

Answer 2

Actually bridge can be used when same protocol is used but topology should also be same.

So Router is the right answer . It can be used for different topology as well as different protocol.