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ISC2 ISSAP Exam - Topic 4 Question 116 Discussion

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

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

Suggested Answer: C

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22 comments · newest first
GR
Gregg 2 days ago
Agreed! CRLs are slow. OCSP is way better.
ER
Ernie 7 days ago
I think it's OCSP. It verifies certificates instantly.
IS
Isabella 12 days ago
OCSP is definitely the right answer. It’s efficient!
AR
Arminda 18 days ago
RSTP and HTTP don't fit here. OCSP is the best choice.
GA
Gail 23 days ago
I feel confident about OCSP too. It's widely used.
SA
Samira 28 days ago
OCSP makes sense. Immediate verification is key.
BE
Bernadine 1 month ago
Agreed! CRLs can be slow. OCSP is much faster.
ST
Stacey 1 month ago
I think it's OCSP. It checks certificates in real-time.
LO
Lottie 1 month ago
RSTP? Really? That's not even close!
LO
Lore 2 months ago
100% agree, OCSP is the way to go for real-time checks.
WE
Wei 2 months ago
Wait, isn't HTTP a protocol too? This is confusing.
CA
Cathrine 2 months ago
I thought it was SKIP at first, but OCSP makes more sense.
RO
Rosalind 2 months ago
It's definitely OCSP!
CO
Cora 2 months ago
I disagree, RSTP could be a contender too!
CH
Chanel 2 months ago
OCSP is the way to go, no doubt about it.
KI
Kimberlie 3 months ago
Wait, is HTTP really an option here? That's wild!
EL
Elliot 3 months ago
I thought it was SKIP at first, but OCSP makes more sense.
LU
Lucina 3 months ago
It's definitely OCSP!
DE
Delmy 3 months 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!
RE
Reita 3 months ago
I’m a bit confused. I thought RSTP was related to network protocols, not certificates. Could OCSP really be the only alternative?
LO
Louvenia 4 months ago
I feel like I studied something about CRLs and alternatives, and OCSP definitely rings a bell. It seems like the right choice.
MI
Miriam 5 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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