Implementing and Operating Cisco Security Core Technologies (SCOR) — Question 330

When configuring ISAKMP for IKEv1 Phase 1 on a Cisco IOS router, an administrator needs to input the command crypto isakmp key cisco address 0.0.0.0.
The administrator is not sure what the IP address in this command is used for. What would be the effect of changing the IP address from 0.0.0.0 to 1.2.3.4?

Answer options

• A. The key server that is managing the keys for the connection will be at 1.2.3.4.
• B. The address that will be used as the crypto validation authority.
• C. All IP addresses other than 1.2.3.4 will be allowed.
• D. The remote connection will only be allowed from 1.2.3.4.

Correct answer: D

Explanation

Changing the IP address from 0.0.0.0 to 1.2.3.4 restricts the remote connection to only allow the specified address. This means that only devices from 1.2.3.4 can initiate a connection, while options A, B, and C do not accurately describe the function of the IP address in this command.