In the switching network shown in the figure, all switches have enabled the STP protocol.

SWA was chosen as the root bridge. According to the information in the figure, the _______ port should be placed in the Blocking state. (Multiple choices)
A . SWC ‘s P1
B . SWC ‘s P2
C . SWD of P1
D . SWD ‘s P2
E . Insufficient information to judge

Answer: BD

Explanation:

Bridge ID : Bridge priority. MAC address

4096 multiples maximum 65535 default 32768

Root Bridge Election: Line compares bridge priority, when comparing MAC addresses, the smaller the priority