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?
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.
Suggested Answer:C🗳️
Pruning unnecessary VLANs from the trunk can be performed with one of two methods: ✑ Manual pruning of the unnecessary VLAN on the trunkThis is the best method, and it avoids the use of the spanning tree. Instead, the method runs the pruned VLAN on trunks. ✑ VTP pruningAvoid this method if the goal is to reduce the number of STP instances. VTP-pruned VLANs on a trunk are still part of the spanning tree. Therefore, VTP-pruned VLANs do not reduce the number of spanning tree port instances. Since the question asked for the choice that is an enhancement to the STP design, VTP pruning is the best choice. Reference: http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.shtml
I would prefer D.
According reference link "VTP-pruned VLANs do not reduce the number of spanning tree port instances". So, there is no enhancement. But we need it. Thus, the answer is manual pruning.
upvoted 2 times
...
This section is not available anymore. Please use the main Exam Page.300-115 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
Bastex
5 years, 5 months ago