Resource usage Most implementations allocate an entry in a table that maps a session to a running operating system process. Because TCP packets do not include a session identifier, both endpoints identify the session using the client's address and port. Whenever a packet is received, the TCP implementation must perform a lookup on this table to find the destination process. Each entry in the table is known as a Transmission Control Block or TCB. It contains information about the endpoints (IP and port), status of the connection, running data about the packets that are being exchanged and buffers for sending and receiving data.
Resource usage Most implementations allocate an entry in a table that maps a session to a running operating system process Because TCP packets do not include a session identifier both endpoints identify the session using the client's address and port Whenever a packet is received the TCP implementation must perform a lookup on this table to find the destination process Each entry in the table is known as a Transmission Control Block or TCB It contains information about the endpoints (IP and port) status of the connection running data about the packets that are being exchanged and buffers for sending and receiving data