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ISC2 ISSAP Exam - Topic 4 Question 116 Discussion

Which of the following protocols is an alternative to certificate revocation lists (CRL) and allows the authenticity of a certificate to be immediately verified?
C) OCSP
A) RSTP
B) SKIP
D) HTTP

ISC2 ISSAP Exam - Topic 4 Question 116 Discussion

Actual exam question for ISC2's ISSAP exam
Question #: 116
Topic #: 4
[All ISSAP Questions]

Which of the following protocols is an alternative to certificate revocation lists (CRL) and allows the authenticity of a certificate to be immediately verified?

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Suggested Answer: C

by Adell at May 17, 2026, 04:24 PM

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Lucina
2 hours ago
It's definitely OCSP!
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Delmy
5 days ago
I remember practicing a question similar to this, and OCSP was the answer there too. It makes sense for immediate verification, but I hope I’m not mixing it up with something else!
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Reita
10 days ago
I’m a bit confused. I thought RSTP was related to network protocols, not certificates. Could OCSP really be the only alternative?
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Louvenia
16 days ago
I feel like I studied something about CRLs and alternatives, and OCSP definitely rings a bell. It seems like the right choice.
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Miriam
2 months ago
I think the answer might be OCSP, but I'm not entirely sure. I remember it being mentioned in relation to real-time certificate validation.
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