Sara, a security administrator, is configuring a new firewall. She has entered statements into the
firewall configuration as follows:
Allow all Web traffic
Deny all Telnet traffic
Allow all SSH traffic
Mike, a user on the network, tries unsuccessfully to use RDP to connect to his work computer at
home. Which of the following principles BEST explains why Mike’s attempt to connect is not
successful?

A.
Explicit deny

B.
Loop protection

C.
Implicit deny

D.
Implicit permit