EIGRP messages are multicast to which IPv4 address?

EIGRP (Enhanced Interior Gateway Routing Protocol) utilizes the multicast address 224.0.0.10 to send its routing updates and other protocol messages. This address is specifically assigned for routing protocols that operate over IP, such as EIGRP, to ensure efficient communication amongst routers in the same autonomous system.

Using a multicast address allows EIGRP to efficiently reach multiple routers simultaneously without the need for broadcasting, which could create unnecessary traffic on the network. The choice of this address is part of the IANA (Internet Assigned Numbers Authority) designation for specific multicast addresses.

Other multicast addresses listed are assigned to different protocols or purposes, making them unsuitable for EIGRP communications. Thus, the use of 224.0.0.10 as the designated multicast address for EIGRP is crucial for its operation and proper function within a network.