Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 146

A network engineer is extending a LAN segment between two geographically separated data centers. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment?

Answer options

• A. Modify the spanning-tree priorities to dictate the traffic flow.
• B. Create a Layer 3 transit VLAN to segment the traffic between the sites.
• C. Use VTP pruning on the trunk interfaces.
• D. Configure manual trunk pruning between the two locations.

Correct answer:

Explanation

The correct answer is C, as VTP pruning optimizes the bandwidth by preventing unnecessary VLAN traffic from being sent across trunk links. Options A and D do not specifically reduce traffic across the extended segment, and option B, while it segments traffic, does not address the issue of traffic crossing the extended LAN segment as effectively as VTP pruning.