Thursday, 7 June 2012

Switching

SWITCH
a) It is a networking device that is used to connect two or more computers within a LAN. b) It is an intelligent device because it works on MAC addresses. c) It is internally based upon the star topology. So all the user can communicates at the same time with same bandwidth. d) It provides additional bandwidth to the existing users in comparison to your hubs. e) MAC table is also known as filter table or CAM table. f) When a source send a message for the destination. First of all there is a Mac address table. There must be entry of source and destination. If there is no any entry of the source then it will be there. After it, it will check whether there is an entry for the destination. If it is not present there then it will broadcasting. Once the address is there in the table then it has no need of broadcasting. But when we start the switch then always first of all it makes broadcast to enter the entry for the client computer once it fill up then there is no any type of broadcasting. Ie. Limited broadcasting. g) No collisions are here in case of a switch. h) Broadcast domain= one i) Collision domain = no. of ports of a switch connected.

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