Câu 43: H12-831: HCIP-Datacom-Advanced Routing & Switching Technology

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 achieve network interoperability. R2, R3, and R4 in branch 2 deploy IS-S to achieve network interoperability. Now the engineer wants to realize the loopback address of R1 to R4. Which of the following operations can meet this requirement?

1. A. In the OSFF process and the IS-IS process of R2, respectively advertise the default route — đáp án hiện tại
2. B. No configuration is required
3. C. Advertise the default route only in the IS-IS process of R2
4. D. Advertise the default route only in the OSPF process of R2