How does EIGRP differ from protocols like OSPF?

EIGRP, or Enhanced Interior Gateway Routing Protocol, is unique because it merges the best aspects of both Distance Vector protocols and Link State protocols, resulting in a hybrid routing approach. This combination allows EIGRP to maintain the simplicity and speed of Distance Vector routing while incorporating the advanced features of Link State routing, such as quicker convergence times and more efficient use of network resources.

Specifically, EIGRP uses a distance vector method for path calculation, employing the Distance Vector Routing Protocol's algorithms, such as Diffusing Update Algorithm (DUAL). However, it also collects and maintains topological information similar to a Link State protocol, allowing it to make better routing decisions based on the overall structure of the network rather than just the metrics of neighbor routers.

This dual capacity makes EIGRP particularly effective in handling a range of network sizes and designs. While it can perform well in both small and large networks, it is not limited to specific sizes or structures, unlike some other routing protocols that may be more effective in particular contexts. Thus, the distinguishing feature of EIGRP is its hybrid nature, which positions it as a versatile option for many routing scenarios.