STP Interview Questions 3

Question 1

Explain Root Guard?

Answer 1

Root guard is used to protect the root bridge. Root Guard stops a new switch introduced in the network with a lower bridge ID to become the root bridge.

Question 2

What is the BPDU Guard?

Answer 2

If any BPDU is received on a port where BPDU Guard is enabled, that port is immediately put into the error-disable state.

Question 3

What is BPDU Filter?

Answer 3

BPDU Filter prevents the port from sending and receiving BPDUs. Disables STP on the port.

Question 4

What is the difference between the BPDU Guard and BPDU Filter?

Answer 4

BPDU Guard only prevents receiving BPDU while the BPDU filter prevents both sending and receiving BPDU.