Which additional capability was added in IGMPv3?
IGMP (Internet Group Management Protocol) is a communications protocol used by hosts and adjacent routers to establish multicast group memberships. It enables hosts to inform adjacent multicast routers about their desire to receive traffic destined to a specific multicast group.
IGMPv3, the latest version of IGMP, includes several additional capabilities over the previous versions, including:
A. Leave group messages support: IGMPv3 enables hosts to send leave messages to the router, indicating that they no longer wish to receive multicast traffic from a specific group. This feature helps routers to efficiently manage the multicast group membership.
B. Source filtering support: IGMPv3 enables hosts to specify the source address of the multicast traffic they want to receive, allowing routers to filter out unwanted traffic. This feature provides more granular control over the multicast traffic flow.
C. Group-specific host membership queries support: IGMPv3 enables routers to send group-specific queries to hosts, asking them about their membership status for a particular multicast group. This feature helps routers to efficiently manage the multicast group membership and reduce unnecessary traffic.
D. IPv6 support: IGMPv3 supports both IPv4 and IPv6 multicast traffic. This feature enables hosts and routers to manage multicast group memberships in both IPv4 and IPv6 environments.
E. Authentication support between the multicast receivers and the last hop router: IGMPv3 provides support for authentication mechanisms between the multicast receivers and the last hop router, preventing unauthorized access to the multicast group.
In conclusion, IGMPv3 includes several additional capabilities over the previous versions, such as leave group messages support, source filtering support, group-specific host membership queries support, IPv6 support, and authentication support between the multicast receivers and the last hop router. These features help hosts and routers to manage multicast group memberships more efficiently and securely.