Which routing table is used for multicasting forwarding cache?

The correct answer references the inet6.0 routing table, which is specifically designated for the IPv6 multicast routing information. In networking, multicast routing is used to send data to multiple destinations simultaneously, and with the emergence of IPv6, distinct routing tables were established to manage the routing of IPv6 traffic effectively.

In the context of multicast routing, inet6.0 contains the routes that define how to forward IPv6 multicast packets. These entries allow network devices to determine the best path for forwarding packets addressed to a multicast group rather than an individual host.

This is particularly important for applications involving video streaming, conferences, and other forms of data distribution where multiple endpoints need to receive the same data flow without overwhelming the network with redundant unicast transmissions.

The other routing tables, such as inet.0, inet.1, and inet6.1, serve different purposes in handling unicast IPv4 and IPv6 routing, but they are not utilized for multicast forwarding cache, which is why they do not apply in this context.