Answer / jitendera

In A swicth network if you have multiple path that is also
called redundancy then Loop occurs

Now Question is that how a Swicth detect that there is a Loop

Switch uses BUDU to Determine that is there any loop accross
the network

How its works

In a switch network every switch broadcast the BPDU Packet (
BUPDU=MAC+ Bridge)

IF a Switch get his BPDU Back he then switch comes to know
that there is a Loop in the network then STP comes in
accounts

Answer / soundarrajan

stp

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