200-301 Question 112
Single answerA network administrator is tasked with configuring multicast in a network to allow video streaming servers to efficiently send data to multiple receivers. The administrator wants to ensure that multicast traffic is forwarded only to devices that have explicitly joined the multicast group. Which protocol should be used on the end devices to manage their membership in multicast groups?
- A
Internet Group Management Protocol (IGMP)
- B
Protocol Independent Multicast (PIM)
- C
Border Gateway Protocol (BGP)
- D
Open Shortest Path First (OSPF)
Show answer and explanation
Correct answer: A
Explanation
In multicast networks, IGMP is the protocol used by end devices (hosts) to communicate with their local router to join or leave multicast groups. This ensures that multicast traffic is forwarded to only the devices that have explicitly requested it, optimizing network efficiency. Other protocols like PIM are used for routing multicast traffic between routers, while BGP and OSPF are unrelated to multicast group membership management.
- A. Correct.
Internet Group Management Protocol (IGMP) is used by end devices to join or leave multicast groups, allowing multicast traffic to be forwarded only to interested receivers.
- B. Incorrect.
Protocol Independent Multicast (PIM) is a multicast routing protocol used between routers to route multicast traffic, but it does not handle membership management on end devices.
- C. Incorrect.
Border Gateway Protocol (BGP) is a routing protocol used for exchanging routing information between autonomous systems and is unrelated to multicast group membership.
- D. Incorrect.
Open Shortest Path First (OSPF) is a link-state routing protocol used within an autonomous system and does not manage multicast group membership.