CiscoCisco
300-420 · Question #409
300-420 Question #409: Real Exam Question with Answer & Explanation
The correct answer is C: STP loop guard. STP loop guard prevents alternate or root ports from becoming designated ports when they stop receiving BPDUs, which protects against STP loops caused by unidirectional or intermittent link
Advanced Enterprise Campus Networks
Question
A network engineer discovers that an alternate or root port on a Cisco Layer 2 switch intermittently becomes the designated port, which causes an STP loop. What must be configured to resolve the issue?
Options
- ASTP root guard
- BPortFast BPDU guard
- CSTP loop guard
- DUDLD
Explanation
STP loop guard prevents alternate or root ports from becoming designated ports when they stop receiving BPDUs, which protects against STP loops caused by unidirectional or intermittent link
Topics
#STP Loop Guard#Spanning Tree Protocol#Layer 2 Switching#STP Protection Mechanisms
Community Discussion
No community discussion yet for this question.