- TCP (Transmission Control Protocol) ------ similar call
1.1 establishing a connection, the data transmission path is formed
1.2 for large data transfers (in the connection data is not limited in size )
1.3 handshake complete the connection by three times, it is a reliable protocol, security service
1.4 connection must be established, efficiency will be slightly lower
- UDP (User Datagram Protocol) ----- similar to texting
2.1 and the source and destination data encapsulated into packets, without establishing a connection
2.2 the size of each packet within the limit of 64K
2.3 because no connection, therefore unreliable protocol
2.4 without establishing a connection, fast