300-420 · Question #401
300-420 Question #401: Real Exam Question with Answer & Explanation
The correct answer is C: OSPF with stub areas. OSPF with stub areas optimizes routing tables, minimizes routing updates, and enhances reliability by reducing unnecessary route advertisements. This approach also prevents routing loops and aligns with RFC 5340 requirements for OSPFv3.
Question
Refer to the exhibit. A mid-size company that produces media content has four offices across the country connected via MPLS Layer 3 service, which is provided by a local ISP. The network uses static routing. In anticipation of future growth, the engineering team must review and recommend design improvements in accordance with RFC 5340 requirements. The solution must optimize the routing table and reduce the number of routing updates exchanged between routers. The updated routing design must also be reliable and avoid routing loops. Which implementation meets the requirements?
Options
- AEIGRP with multiple AS numbers
- BBGP with a unique address family for each location
- COSPF with stub areas
- DOMP with stub-area routers
Explanation
OSPF with stub areas optimizes routing tables, minimizes routing updates, and enhances reliability by reducing unnecessary route advertisements. This approach also prevents routing loops and aligns with RFC 5340 requirements for OSPFv3.
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