You are working for a company that has implemented two routers, Router A and Router B$,$ at the remote site for redundancy. As a gateway, employee computers use the IP $1$ address, which is set on Router A$.$ How can you achieve default gateway redundancy when Router A is unavailable?

No action is needed; the computers automatically detect the failure and learn the IP $2$ address of Router B$.$

You should configure a second gateway that uses the IP $2$ address of Router B$,$ which will be used dynamically when the IP $1$ address is not available.

You should enable a routing protocol on the routers, so the changes in the topology can also be propagated to the personal computers.

You should use router redundancy protocols on the routers.