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

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

A. LDAP Query

B. SMTP AUTH

C. SMTP TLS

D. LDAP BIND

View Answer

Answer: B

Explanation:

SMTP AUTH is a valid fallback action when a client certificate is unavailable during SMTP authentication on Cisco ESA. SMTP AUTH is a method of authenticating SMTP clients using username and password credentials, which can be verified by an LDAP server or a local database on Cisco ESA.

Reference: https://www.cisco.com/c/en/us/td/docs/security/esa/esa12-0/user_guide/b_ESA_Admin_Guide_12_0/b_ESA_Admin_Guide_12_0_chapter_011011.html