Huawei H12-811_V1.0 Online Access

In Spanning Tree Protocol (STP), the Port ID consists of:

8-bit Port Priority

8-bit Port Number

This results in a total length of 16 bits.

B, C, and D are incorrect since they do not represent the full length of the Port ID.

Thus, the correct answer is A (16 bits).

Detailed Explanation:The EUI-64 format splits a MAC address into two parts and inserts " FFFE " in the middle. The Universal/Local (U/L) bit is flipped, so a valid EUI-64 address would be 02E0-FCEF-FFFE-0FEC​.

Comprehensive and Detailed Explanation:

BPDU (Bridge Protocol Data Unit) packets are exchanged only on ports in Blocking, Listening, and Learning states.

Ports in Forwarding state DO NOT receive BPDU packets (BPDUs are only processed by non-designated ports).

If a forwarding port starts receiving BPDUs, it goes back to Listening state to re-evaluate STP topology.

✅ Reference: HCIA-Datacom Switching Guide – STP Port States