单选题Which statement describes the behavior of a security policy？（）A The implicit default security policy permits all traffic.B Traffic destined to the device itself always requires a security policy.C Traffic destined to the device’s incoming interface doe

The implicit default security policy permits all traffic.

Traffic destined to the device itself always requires a security policy.

Traffic destined to the device’s incoming interface does not require a security policy.

The factory-default configuration permits all traffic from all interfaces.