What is the order of virus scanning when multilayer antivirus scanning is configured?

What is the order of virus scanning when multilayer antivirus scanning is configured?
A . The default engine scans for viruses first and the McAfee engine scans for viruses second.
B . The Sophos engine scans for viruses first and the McAfee engine scans for viruses second.
C . The McAfee engine scans for viruses first and the default engine scans for viruses second.
D . The McAfee engine scans for viruses first and the Sophos engine scans for viruses second.

View Answer

Answer: C

Explanation:

If you configure multi-layer anti-virus scanning, the Cisco appliance performs virus scanning with the McAfee engine first and the Sophos engine second. It scans messages using both engines, unless the McAfee engine detects a virus. If the McAfee engine detects a virus, the Cisco appliance performs the anti-virus actions (repairing, quarantining, etc.) defined for the mail policy.

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_chapter_01011.html