Enhanced Interior Gateway Routing Protocol (EIGRP) was designed to enhance which previous routing protocols? (Choose two)

Enhanced Interior Gateway Routing Protocol (EIGRP) was specifically designed to enhance and improve upon the Interior Gateway Routing Protocol (IGRP). IGRP was a distance-vector routing protocol developed by Cisco that used a simple metric system for determining the best paths through a network. EIGRP introduced several advanced features that addressed the limitations of IGRP, such as support for more complex metrics that take into account bandwidth, delay, load, and reliability, which allowed for more efficient routing.

Selecting IGRP reflects an understanding of how EIGRP serves as a second-generation protocol, incorporating improvements in speed, flexibility, and scalability. It employs a hybrid approach, combining aspects of distance-vector and link-state protocols, which further enhances routing efficiency.

While the other protocols listed may have relevance in broader networking contexts, they are not the direct ancestors of EIGRP nor were they enhanced by it. For example, Routing Information Protocol (RIP) is also a distance-vector protocol but did not directly influence the creation of EIGRP, which was fundamentally aimed at improving IGRP.