Refer to the exhibit.
Router R1 currently is configured to use R3 as the primary route to the Internet, and the route uses the default administrative distance settings. A network engineer must configure R1 so that it uses R2 as a backup, but only if R3 goes down.
Which command must the engineer configure on R1 so that it correctly uses R2 as a backup route, without changing the administrative distance configuration on the link to R3?
A.ip route 0.0.0.0 0.0.0.0 g0/1 1 B.ip route 0.0.0.0 0.0.0.0 209.165.201.510 C.ip route 0.0.0.0 0.0.0.0 209.165.200.226 1 D.ip route 0,0.0.0 0.0.0.0 g0/1 6正确答案D
