What is the primary function of the firewall in the SAFE SMR midsize network design corporate Internet module?

A.
Provide connectivity to the Internet or ISP network.

B.
Provide connectivity to the campus module.

C.
Provide connectivity to the WAN module.

D.
Provide connectivity to the LAN module.

E.
Provide the demarcation point between the ISP and the midsize network.

F.
Provide connection state enforcement and detailed filtering for sessions initiated through the firewall.

Explanation:
The primary function of the firewall is to provide connection-state enforcement and detailed filtering for sessions initiated through the firewall.
REF;Safe white papers;page 19
SAFE: Extending the Security Blueprint to Small, Midsize, and Remote-User Networks