GIAC Exam GCIA Topic 1 Question 39 Discussion

Actual exam question for GIAC's GCIA exam

Question #: 39
Topic #: 1

Which of the following algorithms is used as a default algorithm for ESP extension header in IPv6?

APropagating Cipher Block Chaining (PCBC) Mode

BCipher Block Chaining (CBC) Mode

CCipher Feedback (CFB) Mode

DElectronic Codebook (ECB) Mode

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Suggested Answer: B

by Denise at Feb 11, 2024, 06:22 AM

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6 months ago

That makes sense. CBC mode provides better security by chaining blocks together, so it could be the default algorithm.

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7 months ago

I think CBC mode is commonly used in encryption standards, so it might be the default for ESP in IPv6.

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7 months ago

I see. Can someone explain why they think it's Cipher Block Chaining (CBC) Mode?

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7 months ago

I'm not sure, but I think it might be Cipher Feedback (CFB) Mode.

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7 months ago

Actually, I believe it's Cipher Block Chaining (CBC) Mode.

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7 months ago

I think the default algorithm for ESP extension header in IPv6 is Propagating Cipher Block Chaining (PCBC) Mode.

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