COMPUTER NETWORKING

Detailed explanation-1: -In unicasting, the router forwards the received packet through only one of its interfaces. In multicasting, the router may forward the received packet through several of its interfaces. Emulation of multicasting through multiple unicasting is not efficient and may create long delays, particularly with a large group.

Detailed explanation-2: -A multicast routing protocol is a mechanism for constructing a loop-free shortest path from a source host that sends data to the multiple destinations that receives the data.

Detailed explanation-3: -In a source-based approach, an individual routing tree is constructed for each sender in the multicast group. In a multicast group with N hosts, N different routing trees will be constructed for that single multicast group. Packets will be routed to multicast group members in a source-specific manner.

Detailed explanation-4: -Types of links in OSPF Transient link: When several routers are attached in a network, they are known as a transient link. The transient link has two different implementations: Unrealistic topology: When all the routers are connected to each other, it is known as an unrealistic topology.