exam questions

Exam 200-301 All Questions

View all questions & answers for the 200-301 exam

Exam 200-301 topic 1 question 215 discussion

Actual exam question from Cisco's 200-301
Question #: 215
Topic #: 1
[All 200-301 Questions]

How does STP prevent forwarding loops at OSI Layer 2?

  • A. TTL
  • B. MAC address forwarding
  • C. Collision avoidance
  • D. Port blocking
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️

Comments

Chosen Answer:
This is a voting comment (?). It is better to Upvote an existing comment if you don't have anything to add.
Switch to a voting comment New
mikachuu85
Highly Voted 2 years, 8 months ago
Selected Answer: D
Correct answer is D as TTL is Layer 3 which won't apply in this scenario. Thus, answer A is wrong.
upvoted 21 times
laurvy36
2 years, 8 months ago
true, that is the explenation
upvoted 2 times
...
...
ZUMY
Highly Voted 3 years, 6 months ago
D is correct
upvoted 7 times
...
[Removed]
Most Recent 6 months, 3 weeks ago
Selected Answer: D
D is correct
upvoted 3 times
...
[Removed]
2 years ago
Selected Answer: D
corret is D
upvoted 1 times
...
i_am_confused
2 years, 4 months ago
Selected Answer: D
100% D. As others have said TTL is layer 3
upvoted 1 times
...
ZUMY
2 years, 4 months ago
D is correct
upvoted 2 times
...
lohaN73
2 years, 5 months ago
TTL is a layer 3 issue,not works at Layer 2
upvoted 1 times
...
onikafei
2 years, 9 months ago
Selected Answer: D
Learned about looping in other training as well. Port blocking prevents traffic from getting stuck going in circles between other ports. I would have to say it's D in this case
upvoted 2 times
...
galgold
2 years, 9 months ago
Selected Answer: D
confirmed
upvoted 1 times
...
[Removed]
2 years, 9 months ago
its should be D. not A
upvoted 1 times
...
wpena
2 years, 11 months ago
Selected Answer: A
The STP loop guard feature provides additional protection against Layer 2 forwarding loops (STP loops). If BPDUs are not received on a non-designated port, and loop guard is enabled, that port is moved into the STP loop-inconsistent blocking state, instead of the listening / learning / forwarding state.
upvoted 3 times
aike92
2 years, 9 months ago
Correct Ans is D. (if i'm not mistaken) TTL is a Layer 3 mechanism that routers decrement after a successful hop
upvoted 4 times
...
...
Tengereni
3 years, 5 months ago
explanation
upvoted 2 times
...
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.

SaveCancel
Loading ...
exam
Someone Bought Contributor Access for:
SY0-701
London, 1 minute ago