Implementing and Operating Cisco Security Core Technologies (SCOR) — Question 565

What describes the function of the crypto isakmp key C1$c451090787 address 0.0.0.0 0.0.0.0 command when configuring an IPsec VPN tunnel on a Cisco IOS router?

Answer options

• A. It allows connections from any hosts using the defined preshared key.
• B. It defines that all data is going to be encrypted via the VPN.
• C. It configures the IP address and subnet mask of the VPN server.
• D. It drops spoofed VPN traffic using 0.0.0.0 as the source or destination IP address.

Correct answer: A

Explanation

The correct answer is A because the command specifies a preshared key for authentication, allowing any host to connect using that key. Option B is incorrect as it does not define overall encryption but rather authentication. Option C is not accurate since the command does not configure the VPN server's IP address and subnet mask. Option D is also wrong because the command does not deal with spoofed traffic; it focuses on authentication via the preshared key.