CCDE: Cisco Certified Design Expert (Practical) — Question 11

You want to mitigate failures that are caused by STP loops that occur before UDLD detects the failure or that are caused by a device that is no longer sending
BPDUs. Which mechanism do you use along with UDLD?

Answer options

• A. BPDU guard
• B. root guard
• C. loop guard
• D. BPDU filtering

Correct answer: C

Explanation

The correct answer is C, loop guard, which helps to protect against loops that can occur when BPDUs are not received on a port. BPDU guard (A) disables the port if a BPDU is received, root guard (B) prevents a switch from becoming the root bridge, and BPDU filtering (D) stops BPDUs from being sent and received, which can lead to network issues.