Huawei Certified ICT Associate – Data Center Network (HCIA-DCN) — Question 32

Which of the following protocols can be used to prevent loops on a Layer 2 network with redundant links?

Answer options

• A. VRRP
• B. STP
• C. ARP
• D. UDP

Correct answer: B

Explanation

The correct answer is B, STP (Spanning Tree Protocol), which is specifically designed to prevent loops in Layer 2 networks by disabling redundant paths. VRRP (A) is for router redundancy, ARP (C) is used for resolving IP addresses to MAC addresses, and UDP (D) is a transport layer protocol that does not have mechanisms for loop prevention.