Question: Which protocol is used to elect the Root Bridge in STP?

Options:

1. Bridge Protocol Data Unit (BPDU)
2. Routing Information Protocol (RIP)
3. Open Shortest Path First (OSPF)
4. Internet Control Message Protocol (ICMP)

Correct Answer: Bridge Protocol Data Unit (BPDU)

Solution:

BPDU is used in STP to communicate information about bridge IDs and to elect the Root Bridge.