Securing Email with Cisco Email Security Appliance Practice Tests and PDFs

STARTTLS is an SMTP extension that allows email servers to negotiate a secure connection using TLS or SSL encryption. Cisco ESA supports STARTTLS for both inbound and outbound email delivery. Reference: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 5-2. 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_011000.html

Spam Quarantine End-User Authentication Query is a query that Cisco ESA performs against an LDAP server to validate the end-user credentials during login to the End-User Quarantine. Reference: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 10-9. Reference: https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118692- configure- esa-00.html

With DomainKeys or DKIM email authentication, the sender signs the email using public key cryptography. Configuring DomainKeys and DKIM Signing A signing key is the private key stored on the appliance. https://www.cisco.com/c/en/us/td/docs/security/esa/esa11- 1/user_guide/b_ESA_Admin_Guide_11_1/b_ESA_Admin_Guide_chapter_010101.html?bookSearch=tru e

External spam quarantine is a feature that allows Cisco SMA to store and manage spam messages quarantined by multiple Cisco ESAs in one central location, providing a unified view and administration of the spam quarantine data. Reference: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 10-3. Reference: https://www.cisco.com/c/en/us/td/docs/security/security_management/sma/sma11- 0/user_guide/ b_SMA_Admin_Guide/b_SMA_Admin_Guide_chapter_010101.html

SenderBase Reputation Filtering is a feature that allows Cisco ESA to reject or throttle connections from email servers based on their reputation score, which is calculated by Talos using sensor information from various sources. Reference: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 6-2.