Securing Email with Cisco Email Security Appliance (SESA) — Question 31

Which action is a valid fallback when a client certificate is unavailable during SMTP authentication on Cisco ESA?

Answer options

• A. LDAP Query
• B. SMTP AUTH
• C. SMTP TLS
• D. LDAP BIND

Correct answer: B

Explanation

The correct answer is B, SMTP AUTH, as it allows users to authenticate without needing a client certificate. The other options, such as LDAP Query, SMTP TLS, and LDAP BIND, do not serve as fallbacks for SMTP authentication when a client certificate is not available.