A FortiGate AntiVirus profile can be configured to scan for viruses on SMTP, FTP, POP3, and SMB protocols using which inspection mode?

Proxy inspection can also scan these protocols but is generally more resource-intensive and often used when deeper inspection features like content archiving are required.

DNS is a protocol for name resolution and is not an inspection mode for an AntiVirus profile.

Flow-based inspection is commonly used for antivirus scanning on protocols like SMTP, FTP, POP3, and SMB, as it efficiently inspects traffic as it passes through without full proxy reassembly.

Man-in-the-middle refers to SSL/TLS inspection, not a general inspection mode for antivirus scanning on these unencrypted or separately encrypted protocols.