Now the engineer wants to implement R1 to access the loopback interface address of R4. Which of the following operations can meet this requirement?

As shown in the figure, an engineer uses 4 routers to test branch network interoperability. Among them, R1, R2, and R3 in branch 1 deploy OSPF to realize network interoperability. R2, R3, and R4 in branch 2 deploy IS-IS to realize network intercommunication.

Now the engineer wants to implement R1 to access the loopback interface address of R4. Which of the following operations can meet this requirement?
A . In the OSFF process and the IS-IS process of R2, the default route is advertised respectively
B. No configuration required
C. Advertise the default route only in the IS-IS process of R2
D. Advertise the default route only in the OSPF process of R2

View Answer

Answer: A