Your Internet-facing router is under a DDoS attack. When this happens, you sometimes lose SSH
access to the device. Which type of ACL must you use to ensure availability?

A.
Use an IP receive ACL (rACL) that permits SSH.

B.
Use an rACL that denies SSH traffic.

C.
Use an rACL that permits SSH and rate limits the traffic.

D.
Use an ACL that permits SSH.