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Juniper Exam JN0-351 Topic 3 Question 38 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 38
Topic #: 3
[All JN0-351 Questions]

Which two statements about redundant trunk groups on EX Series switches are correct? (Choose two.)

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Suggested Answer: C, D

Cis correct because Layer 2 control traffic is permitted on the secondary link of a redundant trunk group (RTG) on EX Series switches.Layer 2 control traffic includes protocols such as LLDP, LACP, and STP, which are used to exchange information and coordinate actions between switches1.According to the Juniper Networks documentation2, Layer 2 control traffic is allowed to pass through both the active and the secondary links of an RTG, but data traffic is only forwarded through the active link. This allows the switches to maintain their Layer 2 adjacencies and monitor the link status on both links.

Dis correct because if the active link fails, then the secondary link automatically takes over in an RTG on EX Series switches.An RTG consists of two trunk links: an active or primary link, and a secondary or backup link2. The active link is used to forward data traffic, while the secondary link is in standby mode.If the active link fails or becomes unavailable, the secondary link immediately transitions to a forwarding state and takes over the data traffic without waiting for normal STP convergence2. This provides fast recovery and redundancy for the network.


by Loren at Feb 06, 2025, 10:52 AM

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Man
9 days ago
Whoa, this question is like a game of Tetris - gotta fit all the pieces together correctly! I'm betting on A and B, but I could be way off. Maybe I should have consulted the Magic 8-Ball before answering.
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Thea
15 days ago
Haha, redundant trunk groups, eh? Sounds like a fancy way of saying 'backup plan in case the main plan fails.' Better have a plan B, right? Anyway, I think B and D are the way to go.
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Vince
16 days ago
This is a tricky one. I'm not sure about C, but the other three options sound plausible. Hmm, maybe I should have studied harder for this exam.
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Patti
4 days ago
User 2: Yeah, and B makes sense too, having a backup link is important.
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Elenor
6 days ago
User 1: I think A is correct, it helps balance the traffic.
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Latricia
1 months ago
I'm not sure about C and D. Can someone explain why they are not correct?
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Miles
1 months ago
I'd go with A and B. Load-balancing across the uplink interfaces and automatic failover on link failure are critical for redundancy.
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Izetta
1 months ago
I agree with Desmond. A and B make sense because they ensure traffic balance and failover.
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Lavonna
1 months ago
B and D seem to be the correct options here. The secondary link should take over if the active link fails, and the redundant trunk group should be connected to the same aggregation switch.
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Magda
6 days ago
Definitely, having redundant trunk groups can help ensure network reliability.
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Kallie
11 days ago
That makes sense. It's important for redundancy and failover.
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Marshall
17 days ago
I agree, and I think D is also correct because redundant trunk groups must be connected to the same aggregation switch.
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Selma
18 days ago
I think B is correct because the secondary link should take over if the active link fails.
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Desmond
2 months ago
I think the correct statements are A and B.
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