Refer to the exhibit. EIGRP has been configured on all routers in the network. What
additional configuration statement should be included on router R4 to advertise a default
route to its neighbors?

A.
R4(config)# ip default-network 10.0.0.0

B.
R4(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1

C.
R4(config)# ip route 10.0.0.0 255.0.0.0 10.1.1.1

D.
R4(config-router)# default-information originate

Explanation:
The “ip default-network ” command will direct otherrouters to send its unknown traffic to this
network. Other router (R1,R2,R3) will indicate thisnetwork as the “Gateway of last resort”.
There is another way to route unknown traffic to 10.1.1.0/24 network: create a static route
using “ip route 0.0.0.0 0.0.0.0 10.1.1.2″command then inject this route using the “network
0.0.0.0″command, or using “redistribute static” command.
Note: In EIGRP, default routes cannot be directly injected (as they can in OSPF with the
default-information originate command. Also, EIGRP does not have the “default-information
originate” command).