Cisco Certified Network Professional Practice Test 2026 – Your All-in-One Guide to Exam Success!

The command used to define the tunnel destination in a GRE (Generic Routing Encapsulation) tunnel is indeed "tunnel destination". This command specifies the IP address of the remote endpoint that will receive the encapsulated packets. In a GRE configuration, it is essential to establish both the source and the destination to allow proper communication across the tunnel. The "tunnel destination" command plays a crucial role in directing GRE packets to the correct remote tunnel interface, enabling encapsulated traffic to flow seamlessly.

The other commands mentioned serve different functions within the configuration of a GRE tunnel. For example, "tunnel source" designates the local source address that will be used to send encapsulated packets, while "tunnel endpoint" is not a standard command used in GRE configurations. The "ip address" command would typically assign an IP address to the GRE tunnel interface, but it does not specify the destination endpoint for the GRE tunnel itself. Understanding the specific role of each command is critical for correctly setting up a GRE tunnel within Cisco networking environments.