CompTIA Network+ (N10-008) — Question 768

A network technician reviews an entry on the syslog server and discovers the following message from a switch:

SPANNING-TREE Port 1/1 BLOCKED -
Which of the following describes the issue?

Answer options

• A. A loop was discovered, and the impact was mitigated.
• B. An incorrectly pinned cable was disconnected.
• C. The link-local address on the port is incorrect.
• D. The port was shut down, and it needs to be reactivated.

Correct answer: A

Explanation

The correct answer is A because when a spanning tree protocol (STP) message indicates a port is blocked, it typically means that a loop was detected and STP took action to prevent it. The other options do not relate directly to the STP protocol or its function of preventing network loops.