which two commands set the gateway of last resort to the default gateway?

“The ip default-network command is used mostly with routing protocols. The ip route command is used with static routing. Both are achieving the same goals but can be used in different scenarios. If you have a routing protocol for a domain, and you would like to advertise to the rest of the routers that a default route, you would implement the ip default-network command. This would cause the routing protocol to carry the candidate for default network in its routing updates to all routers in the domain.”