What is the result of running the crypto isakmp key ciscXXXXXXXX address 172.16.0.0 command?

What is the result of running the crypto isakmp key ciscXXXXXXXX address 172.16.0.0 command?
A . authenticates the IKEv2 peers in the 172.16.0.0/16 range by using the key ciscXXXXXXXX
B . authenticates the IP address of the 172.16.0.0/32 peer by using the key ciscXXXXXXXX
C . authenticates the IKEv1 peers in the 172.16.0.0/16 range by using the key ciscXXXXXXXX
D . secures all the certificates in the IKE exchange by using the key ciscXXXXXXXX

View Answer

Answer: B

Explanation:

The syntax of above command is:

crypto isakmp key enc-type-digit keystring {address peer-address [mask] | ipv6 ipv6-address/ipv6-prefix | hostname hostname} [no-xauth]

The peer-address argument specifies the IP or IPv6 address of the remote peer.

Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/security/a1/sec-a1-cr-book/sec-cr-c4.html#wp6039879000