Nokia Exam 4A0-105 Topic 5 Question 95 Discussion

Actual exam question for Nokia's 4A0-105 exam

Question #: 95
Topic #: 5

[All 4A0-105 Questions]

Which of the following are true when ports are configured with the IEEE 802.3ah Loopback Control feature? (Choose 3)

AThe loopback control PDU instructs the remote port to enter loopback mode.

BPutting a port in loopback does not affect customer data flow

CBoth ports must rediscover the OAM capabilities of each other once the port is put back into service.

DBoth ports must still send Information PDUs to avoid going back to discovery mode.

EWhen a port is in loopback mode, service mirroring will still work if it is a mirror-source or mirror-destination.

FAll packets, except for information PDUs, are looped back.

Show Suggested Answer

Suggested Answer: A, D, F

by Lemuel at Aug 25, 2024, 11:21 AM

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Frank

1 months ago

Hmm, I'm not sure about B. Putting a port in loopback could definitely affect customer data flow, unless they've got some kind of magic loopback mode. Time to consult the networking genie!

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Sol

1 months ago

As an IT technician, I can confirm that Option E is true. Mirroring will still work while in loopback mode. It's like having a virtual mirror ball - just don't try to disco dance with it!

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Mertie

13 hours ago

C) Both ports must rediscover the OAM capabilities of each other once the port is put back into service.

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King

9 days ago

E) When a port is in loopback mode, service mirroring will still work if it is a mirror-source or mirror-destination.

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Belen

18 days ago

A) The loopback control PDU instructs the remote port to enter loopback mode.

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Raelene

1 months ago

Interesting question! I'll go with A, C, and F. Rediscovering the OAM capabilities is crucial when the port comes back online.

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Noel

1 months ago

I agree with A and F too. The loopback control PDU should direct the remote port to enter loopback mode, and only the OAM frames should be allowed through.

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Aide

1 months ago

C and D are true because both ports need to rediscover each other's capabilities and continue sending Information PDUs to avoid going back to discovery mode.

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