COMPUTER NETWORKING

Detailed explanation-1: -2. What is assigned by the transport layer to identify an application or service? Explanation: Source port addresses are assigned by the transport layer to identify the individual conversation and destination port addresses to identify the service being looked for.

Detailed explanation-2: -The combination of the Transport layer port number and the Network layer IP address assigned to the host uniquely identifies a particular process running on a specific host device and is called a socket.

Detailed explanation-3: -Transport Layer uses a port number to deliver the segmented data to the correct process amongst the multiple processes that are running on a particular host. A port number is a 16-bit address used by transport layer to identify any client-server program.

Detailed explanation-4: -Services provided to the transport layer Logical Addressing − Network layer adds header to incoming packet which includes logical address to identify sender and receiver. Routing − It is the mechanism provided by Network Layer for routing the packets to the final destination in the fastest possible and efficient way.