CompTIA Network+ N10-006 Q503

A technician wants to configure the inbound port of a router to prevent FTP traffic from leaving the LAN.
Which of the following should be placed on the router interface to accomplish this goal?

A. Static routes for all port 80 traffic
B. DHCP reservations for all /24 subnets
C. ACL for ports 20 and 21
D. MAC filtering using wildcards

Correct Answer: C