Fill in the blank with the appropriate term.The ______________is a communication protocol that communicates information between the network routers and the multicast end stations. Answer: IGMP

Question

Options

• AIGMP

• A
  100% (40)

Explanation

IGMP (Internet Group Management Protocol) is correct because it is specifically designed to manage multicast group membership between routers and end stations (hosts) on a network. IGMP allows hosts to join or leave multicast groups, and routers use this information to determine which interfaces should receive multicast traffic - making it precisely the protocol that "communicates information between network routers and multicast end stations."

Since this question has only one choice (A), there are no distractors to eliminate, but common confusers in broader exam contexts include:

• OSPF/BGP - these are routing protocols, not multicast management protocols
• ICMP - handles error reporting and diagnostics, not multicast group membership
• IGMP vs. MLD - MLD (Multicast Listener Discovery) is IGMP's IPv6 equivalent; IGMP applies to IPv4 networks

Memory tip: Think of IGMP as the "guest list manager" for a multicast party - hosts tell the router they want to join a multicast group (RSVP), and the router keeps the list updated so traffic only flows where it's wanted.

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