When you configure an access list on the external interface of a FlexVPN hub, which step is optional?
A. allowing IP protocol 50
B. allowing ICMP protocol
C. allowing UDP port 500
D. allowing UDP port 4500
When you configure an access list on the external interface of a FlexVPN hub, which step is optional?
A. allowing IP protocol 50
B. allowing ICMP protocol
C. allowing UDP port 500
D. allowing UDP port 4500