Why might a network prefer EIGRP or OSPF over RIP in modern designs?

• A. Because RIP supports more scalable hierarchies by default.
• B. Because OSPF is a distance-vector protocol with simple implementation.
• C. Because EIGRP and OSPF generally require less CPU, memory, and converge faster, with OSPF being link-state and EIGRP having DUAL features.
• D. Because RIP automatically supports multiple routing protocols simultaneously.

Answer: (D)

The main idea is that modern routing designs favor protocols that converge quickly, scale to large networks, and handle modern IP addressing features efficiently. RIP’s limitations—a fixed 15-hop limit, periodic updates, and slower convergence—make it problematic in dynamic environments. In contrast, OSPF and EIGRP offer robust ways to grow networks: OSPF uses a link-state approach with areas, a shortest-path calculation, and rapid, triggered updates that help large networks recover quickly from changes; EIGRP uses the DUAL algorithm for fast, loop-free convergence and supports unequal-cost load balancing, along with incremental updates. They also support CIDR/VLSM, reducing waste and enabling more scalable designs. So, the key reason networks prefer EIGRP or OSPF is their faster convergence and better scalability compared to RIP, not statements about automatically handling multiple protocols.