Which of the following is NOT a packet type used by Enhanced Interior Gateway Routing Protocol (EIGRP)?

A.
Query

B.
Reply

C.
Ack

D.
Response

Explanation:
Response is not a packet type used by EIGRP. The following are the packet types used by EIGRP:
Hello/Ack: Establish neighbor relationships. The Ack packet is used to provide acknowledgement of a
reliable packet.
Update: Send routing updates.
Query: Ask neighbors about routing information.
Reply: Provide response to queries about routing information.
Requests: Gain specific information from one or more neighbors.Objective:
Routing Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot EIGRP for IPv4 (excluding authentication, filtering, manual summarization,
redistribution, stub)

Cisco > Support > Cisco IOS Software > Configuring EIGRP