What you mean by bridge ?
A bridge is
a hardware device that is used to connect two or more local area network for
exchange of data. They can connect that LANS having different cabling or
protocol and operate the data link layer of OSI model .
for managing flow of data between two LANS it depends on the address of every
packet of data receiving . by it .
Bridge are used to connect two subnetworks which
use identical protocol .
It basically
connect two LANS to from an extand LAN.
A bridge basic function
Examining
and learning the address of the nodes .
Frams
filtering reformatting and forwarding.
Routing the
frames.
Bridge connecting two LANS . main
function of such bridge
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1. It reads all frames transmitted on
first LAN and accpect those addressed to any station on second LAN.
2. It uses the medium access control
protocol for second LAN and retransmit each frames onthat.
3. It
similarly reads frames from second LAN accpect them and retransmits them
to first LAN.
A bridge makes no modification to formate or content of the frames
.rather it simply copies it from LAN 1 and retransmits it on LAN2 .
A bridge should
have enough buffer space to meet peak demands as many frames at a faster rate
may arrive over a short period of time to it .it also contain addressing and
routing intelligence.
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