Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 293

When an OSPF design is planned, which implementation can help a router not have memory resource issues?

Answer options

• A. Have a backbone area (area 0) with 40 routers and use default routes to reach external destinations.
• B. Have a backbone area (area 0) with 4 routers and 30,000 external routes injected into OSPF.
• C. Have less OSPF areas to reduce the need for interarea route summarizations.

Correct answer: O, S, P, F, O, S, P, F

Explanation

Option C is correct because having fewer OSPF areas reduces the complexity of routing and the amount of routing information that needs to be processed, thus conserving memory resources. Option A, while it suggests using default routes, still has a high number of routers which could lead to resource issues. Option B presents a scenario with a very high number of external routes, which would overwhelm the router's memory capacity.