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Juniper JN0-351 Exam - Topic 1 Question 46 Discussion

What is a purpose of using a spanning tree protocol?
B) to eliminate broadcast storms
A) to look up MAC addresses
C) to route IP packets
D) to tunnel Ethernet frames

Juniper JN0-351 Exam - Topic 1 Question 46 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 46
Topic #: 1
[All JN0-351 Questions]

What is a purpose of using a spanning tree protocol?

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Suggested Answer: B

A broadcast storm is a network condition where a large number of broadcast packets are sent and received by multiple devices, causing congestion and performance degradation1.A broadcast storm can occur when there are loops in the network topology, meaning that there are multiple paths between two devices2.

A spanning tree protocol is a network protocol that prevents loops from being formed when switches or bridges are interconnected via multiple paths.It does this by creating a logical tree structure that spans all the devices in the network, and disabling or blocking the links that are not part of the tree, leaving a single active path between any two devices3.

By eliminating loops, a spanning tree protocol also eliminates broadcast storms, as broadcast packets will not be forwarded endlessly along the looped paths.Instead, broadcast packets will be sent only along the tree structure, reaching each device once and avoiding congestion3.


by Kaitlyn at Jul 31, 2025, 03:51 AM

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Eleonore
6 months ago
I thought it was for routing IP packets?
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Jesusa
6 months ago
Totally agree, B is the right answer!
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Vernice
7 months ago
Wait, does it really help with broadcast storms?
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Josephine
7 months ago
Nope, it's definitely not for looking up MAC addresses!
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Hannah
8 months ago
It's mainly to eliminate broadcast storms.
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Paris
8 months ago
I vaguely recall that STP is used to manage network topology, so I guess it could be related to eliminating broadcast storms, like in option B.
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Irving
8 months ago
I feel like I might be mixing up STP with something else, but I don't think it's about routing IP packets. That seems off.
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Tracey
8 months ago
I remember practicing a question about broadcast storms, and I think option B might be the right answer since STP helps with that.
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Gerri
9 months ago
I think spanning tree protocol is mainly about preventing loops in the network, but I'm not sure which option that relates to.
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Anthony
9 months ago
I'm confident the answer is B. Spanning tree protocols are designed to identify redundant links in a network and block them to prevent broadcast storms and maintain a loop-free topology.
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Galen
9 months ago
Okay, I remember learning about spanning tree protocols in class. I believe the main purpose is to prevent network loops and ensure redundant links don't cause issues, so I'll select option B.
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Dorothy
9 months ago
Hmm, I'm a bit confused on this one. I know spanning tree protocols have something to do with network topology, but I'm not sure if it's for looking up MAC addresses or routing IP packets. I'll have to think this through carefully.
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Candra
9 months ago
I'm pretty sure the purpose of a spanning tree protocol is to eliminate broadcast storms, so I'll go with option B.
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Trina
10 months ago
Haha, tunneling Ethernet frames? That's a new one! I'm going to have to go with B on this one. Spanning tree keeps those pesky loops at bay.
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Angelyn
10 months ago
Yes, that's correct. Spanning tree protocol is used to prevent loops in a network.
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Annelle
10 months ago
I believe it also helps in creating a loop-free topology.
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Blythe
10 months ago
I'm going with B. Broadcast storms are the bane of network admins, and spanning tree is the solution to that problem. The other choices just don't seem as relevant.
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Dean
6 months ago
For sure! Eliminating broadcast storms is crucial for smooth operations.
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Delsie
7 months ago
I was torn between B and C, but B makes more sense.
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Millie
7 months ago
Exactly! Spanning tree helps keep the network stable.
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Yen
7 months ago
I agree, B is definitely the right choice. Broadcast storms can really mess things up.
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Laurel
11 months ago
Hmm, I'd say B or C. Routing IP packets seems like a reasonable use case for spanning tree, but eliminating broadcast storms is the classic one. Not sure about the other options though.
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Reiko
11 months ago
I agree with Katlyn, using a spanning tree protocol helps prevent broadcast storms.
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Barrie
11 months ago
Definitely B. Spanning tree protocol is all about preventing broadcast storms and maintaining a loop-free topology. I'm pretty sure that's the main purpose.
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Martha
10 months ago
Without spanning tree protocol, networks could experience issues with loops and broadcast storms.
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Kris
10 months ago
It also helps maintain a loop-free topology, which is important for network stability.
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Phyliss
11 months ago
I agree, B is the correct answer. Spanning tree protocol helps prevent broadcast storms.
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Katlyn
11 months ago
I think the purpose is to eliminate broadcast storms.
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