Which three protocols are required when considering firewall rules for email services using a Cisco Email Security Appliance? (Choose three.)
A. HTTP
B. SMTP
C. TFTP
D. FTP
E. DNS
F. SNMP
Which three protocols are required when considering firewall rules for email services using a Cisco Email Security Appli
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Which three protocols are required when considering firewall rules for email services using a Cisco Email Security Appli
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