Question

Which of the following is not a part of an Extension?

(a) Extension Identifier

(b) Extension value

(c) Criticality Indicator

(d) All of the mentioned constitute the Extension

This question was addressed to me during an interview.

My doubt stems from Public Keys and X.509 Certificates-II topic in portion Message Authentication Codes, Whirlpool Algorithm and Key Management and Distribution of Cryptograph & Network Security

Answer 1

Correct answer is (d) All of the mentioned constitute the Extension

To explain I would say: Extension Identifier, Extension value and the Criticality Indicator all constitue the Extension header.