Designing Cisco Network Service Architectures (ARCH, legacy) — Question 93

In what situation must spanning-tree be implemented?

Answer options

• A. when first hop redundancy protocol exists with redundant Layer 2 links between distribution switches
• B. when a VLAN spans access layer switches to support business applications
• C. when trunks need to extend multiple VLANs across access switches
• D. when it is necessary to speed up network convergence in case of link failure

Correct answer: A

Explanation

Spanning-tree must be implemented when there are redundant Layer 2 links to prevent loops that can disrupt network traffic. Other options, while related to network configuration, do not specifically require spanning-tree for loop prevention or redundancy management.