TCP>> Transmition Control Protocol
UDP>> User Datagram Protocol
TCP which is a protocol that allows for communication within an application program to access ato use the service. TCP is called “Connetion-Oriented”. Ensure package to the destination. Still remember Header-Header in TCP?
there is a header that indicates the serial number of the first octet in the TCP segment. exist that show the serial number of data packets (acknowledgment). so that if the data packet until the destination. they will be in descending back, so that no data packets to be sent back.