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

Show Suggested Answer

Suggested Answer: B

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

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7 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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8 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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8 months ago

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

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8 months ago

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

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9 months ago

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

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9 months ago

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

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