Question

Suppose a TCP segment is sent while encapsulated in an IPv4 datagram. When the destination host gets it, how does the host know that it should pass the segment (i.e. the payload of the datagram) to TCP rather than to UDP or some other upper-layer protocol

Answer 1

Answer and Explanation:

A host needs some datagram where TCP is encapsulated in the datagram and contains the field called a protocol. The size for the field is 8-bit.

The protocol identifies the IP of the destination where the TCP segment is encapsulated in a datagram.

The protocol field is 6 where the datagram sends through TCP and 17 where the datagram is sent through the UDP as well

Protocol with field 1 is sent through IGMP.

The packet is basic information that is transferred across the network and sends or receives the host address with the data to transfer. The packet TCP/IP adds or removes the field from the header as well.

TCP is called connection-oriented protocol as it delivers the data to the host and shows TCL receives the stream from the login command. TCP divides the data from the application layer and contains sender and recipient port for order information and known as a checksum. The TCP protocol uses the checksum data to determine that data transferred without error.