Cisco ENCOR Practice Exam 2025 – All-in-One Comprehensive Guide to Mastering Enterprise Network Core Technologies!

EIGRP, or Enhanced Interior Gateway Routing Protocol, utilizes several specific packet types to facilitate its routing functions. The types of packets that EIGRP commonly uses include Updates, Requests, and Replies.

The Update packet is crucial for sharing routing information between EIGRP neighbors. When a router has new routing information, it sends an Update packet to inform its neighbors about this information, which may include new routes, changes to existing routes, or route deletions.

The Request packet serves as a means for one EIGRP router to solicit routing information from its neighbors. If a router does not have the necessary routing information to make informed decisions, it will send a Request packet to ask for the required data.

The Reply packet is used to respond to a Request packet. It is the mechanism through which the requested information is sent back to the originating router.

In contrast, EIGRP does not utilize a packet type known as Check. There is no defined packet type in the EIGRP protocol that serves this purpose, making it the correct choice for the question. Thus, among the options provided, Check does not correspond to any function or requirement within the EIGRP protocol framework.