Question

For practical reasons, a PKI is often set up with multiple levels of CAs. There is a top-level CA, called the ________, which issues certificates on the keys of lower-level CAs, which in turn certify the user keys. A) Root CA

B) Subordinate CA

C) Intermediate CA

D) Primary CA

Answer 1

In a PKI, the top-level CA is called the Root CA, which issues certificates for lower-level CAs. These lower-level CAs are known as Subordinate or Intermediate CAs.

Step-by-step explanation:

For practical reasons, a Public Key Infrastructure (PKI) is often set up with multiple levels of Certificate Authorities (CAs). There is a top-level CA, called the Root CA, which issues certificates on the keys of lower-level CAs, which in turn certify user keys. Options B) Subordinate CA and C) Intermediate CA refer to these lower-level CAs, while D) Primary CA is not a standard term used in PKI. Therefore, the correct answer is A) Root CA.