Palo Alto Networks Certified Network Security Engineer (PCNSE) — Question 110

Which administrative authentication method supports authorization by an external service?

Answer options

• A. Certificates
• B. LDAP
• C. RADIUS
• D. SSH keys

Correct answer: C

Explanation

RADIUS is the correct answer because it is specifically designed to communicate with external authentication services for user authorization. While LDAP also interacts with external directories, it focuses more on directory services rather than being solely an authentication method, making RADIUS the more appropriate choice here. Certificates and SSH keys are primarily used for authentication but do not involve external authorization services.