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Exam 300-420 topic 1 question 60 discussion

Actual exam question from Cisco's 300-420
Question #: 60
Topic #: 1
[All 300-420 Questions]

An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology. The network will support an engineering environment where it is necessary for end-users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning-tree topology is not affected by these rogue switches?

  • A. BPDU Skew Detection
  • B. BPDU guard
  • C. loop guard
  • D. root guard
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Suggested Answer: D 🗳️
by cwoolie at April 20, 2022, 7:25 p.m.

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certstudent2016
Highly Voted 1 year, 6 months ago
Selected Answer: D
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/10588-74.html As I mentioned earlier dont trust posts from cwoolie
upvoted 7 times
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wolfone
Most Recent 2 months, 1 week ago
Selected Answer: D
The better solution, in my opinion, would be "bpdu filter", but it's not in the list!
upvoted 1 times
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DOSKIM
7 months, 2 weeks ago
D is the way to go with
upvoted 1 times
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Mohali98
11 months, 2 weeks ago
Selected Answer: D
D is the right answer ... root guard is the required feature
upvoted 2 times
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Hope66
1 year, 6 months ago
Rogue switch could become the new root switch. This can influence the spanning-tree topology I think that the answer is D (root guard)
upvoted 2 times
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cwoolie
1 year, 6 months ago
This should be loop guard not root guard.
upvoted 1 times
zlimvos
1 year, 4 months ago
No. bpgu guard: don't allow any switch to connect on your STP. root guard: allow switch to connect but with lower priority.
upvoted 1 times
johnu329
1 year, 1 month ago
If you were to use bpdu guard, it would no longer be possible "for end-users to connect their own network switches for testing purposes". Their switches may send BPDU's and therefore the port would not become operation. So, in this case you would choose: root guard That way, they will be able to connect their switches, yet no topology change will occur.
upvoted 3 times
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C (25%)
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