Cisco CCNA 200-301 Practice Question

To configure a default static route that directs all traffic for undefined networks to a specific next-hop IP address, you use the command ip route 0.0.0.0 0.0.0.0 <next-hop IP address>. The 0.0.0.0 0.0.0.0 specifies a destination network of all zeros with a subnet mask of all zeros, which matches any destination IP address not found in the routing table. Using a subnet mask of 255.255.255.255 creates a host route to a specific IP, not a default route. Specifying an exit interface instead of a next-hop IP is acceptable in certain scenarios, but the requirement is to forward to a specific next-hop IP address. Setting the next-hop to Null0 would discard all packets destined for unknown networks, which is not desired in this case.