The correct answer is D. IGMP (Internet Group Management Protocol). IGMP is a protocol used by IP hosts to report their multicast group memberships to any neighboring multicast routers. It allows devices to join and leave specific multicast groups, ensuring that only interested members receive the multicast traffic.
ICMP (Internet Control Message Protocol) and ARP (Address Resolution Protocol) are not the correct options because they do not multicast messages and information among all member devices in an IP multicast group.
ICMP is primarily used for diagnostic and error reporting purposes. It is typically used by network devices to send error messages or control packets to other network devices. While ICMP can be used for multicasting in some cases, its primary function is not related to multicasting.
ARP, on the other hand, is a protocol used for resolving IP addresses to MAC addresses in a local area network (LAN). It allows devices on a LAN to map an IP address of another device to its corresponding MAC address. ARP operates at the link layer of the TCP/IP model and does not specifically deal with multicasting functionality.
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