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Q1. Which of the following is true about Public Key Infrastructure?

A. PKI is a combination of digital certificates, public-key cryptography, and certificate authorities that provide enterprise wide security.

B. PKI uses two-way  symmetric key encryption with digital certificates, and Certificate Authority.

C. PKI uses private and public keys but does not use digital certificates.

D. PKI uses CHAP authentication.

Correct Answer: A.

 Explanation: 

Public-key infrastructure (PKI) consists of the following components:

1. Digital certificates, 
2. Public-key cryptography, and 
3. Certificate authorities

The above components are integrated to provide a wide area network security infrastructure that is secure,
 and widely used in todays Internet environment.

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