Discuss Nokia 4A0-105 Exam Topic 5 Question 19

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.

Suggested Answer: A, D, F

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12 comments · newest first

Portia 12 months ago

F is spot on, only info PDUs get through.

Janae 12 months ago

Wait, E? I thought mirroring wouldn't work in loopback mode!

Carole 12 months ago

C sounds right, rediscovery is needed after loopback.

Nikita 1 year ago

I think B is misleading, it can affect data flow in some cases.

Yvette 1 year ago

A is definitely true, that's how loopback works.

Kelvin 1 year ago

D sounds familiar, but I can't remember if it's really required to keep sending Information PDUs. It might be a trick question!

Giuseppe 1 year ago

I feel like C is correct too, since rediscovering OAM capabilities seems like a necessary step after exiting loopback mode.

Tora 1 year ago

I'm not so sure about B. I remember something about loopback affecting data flow, but I can't recall the specifics.

Percy 1 year ago

I think option A is definitely true because the loopback control PDU is supposed to instruct the remote port to enter loopback mode.

Yong 1 year ago

This looks like a straightforward estate tax calculation. I'll start by subtracting the marital and charitable deductions from the gross estate to get the taxable estate.

Tammy 1 year ago

I think I need to calculate the months of expenses first, then see if that aligns with one of the answer choices.

Delisa 1 year ago

Hmm, this is a tricky one. I'm not sure if Reinforcement Learning is the best fit here, as the problem doesn't seem to involve an agent interacting with an environment. I'm leaning more towards a Regression or Time Series model, but I'll need to think it through a bit more.

Nokia 4A0-105 Exam - Topic 5 Question 19 Discussion