Linux Foundation LFCS Exam - Topic 5 Question 111 Discussion

Actual exam question for Linux Foundation's LFCS exam

Question #: 111
Topic #: 5

With IPv6, how many bits have been used for the interface identifier of an unicast address? (Specify the number using digits only.)

A64

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Suggested Answer: A

by Angelo at Apr 05, 2026, 01:15 AM

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1 day ago

64 bits, for sure!

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22 days ago

I’m pretty certain it’s 64 bits for the interface identifier, but I should double-check my notes just to be safe.

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27 days ago

I’m a bit confused; I thought it might be 128 bits total, but I think the interface part is 64 bits.

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1 month ago

I remember practicing a question like this, and I believe it was also about the 64 bits for the interface identifier.

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1 month ago

I think the interface identifier for IPv6 unicast addresses is 64 bits, but I’m not 100% sure.

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