Which type of remote gateway should the administrator configure on FortiGate for the new IPsec VPN tunnel to work?

A network administrator is configuring a new IPsec VPN tunnel on FortiGate. The remote peer IP address is dynamic. In addition, the remote peer does not support a dynamic DNS update service.

Which type of remote gateway should the administrator configure on FortiGate for the new IPsec VPN tunnel to work?
A . Pre-shared key
B . Dialup user
C . Dynamic DNS
D . Static IP address

Answer: B

Explanation:

In a scenario where the remote peer IP address is dynamic, and the remote peer does not support a dynamic DNS update service, the appropriate choice for configuring the remote gateway on FortiGate is:

B. Dialup user

Configuring the remote gateway as a dialup user allows flexibility for dynamic remote peer IP addresses without relying on dynamic DNS. Dialup user configurations are suitable for scenarios where the remote peer’s IP address may change dynamically, and it is not possible to use a static IP address or dynamic DNS.

The peer IP is not static.

D cannot be correct as the remote peer has a dynamic address so this will not be known to the local side as it may change.

The same goes for dynamic.

PSK is not an option, the answer is B.