N10-005 Question #708: Real Exam Question with Answer & Explanation

The correct answer is A: PKI. X.509 is the standard format for digital certificates used in Public Key Infrastructure (PKI). PKI uses these certificates to authenticate users and devices by binding a public key to an identity through a Certificate Authority (CA). Kerberos uses tickets and symmetric key crypto

Question

Which of the following would allow a network administrator to implement a user authentication method that uses X.509 certificates?

Options

APKI
BKerberos
CTACACS+
DRADIUS

Explanation

X.509 is the standard format for digital certificates used in Public Key Infrastructure (PKI). PKI uses these certificates to authenticate users and devices by binding a public key to an identity through a Certificate Authority (CA). Kerberos uses tickets and symmetric key cryptography, not X.509 certificates. TACACS+ and RADIUS are AAA protocols that support various authentication methods but are not inherently certificate-based systems - PKI is specifically the framework that issues and manages X.509 certificates for authentication.

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