TCP/UDP (Socket Communication)

TCP (Transmission Control Protocol)

Provides a connection-oriented service.
Guarantees high reliability.
Establishes connections with 3-way handshaking.
Terminates connections with 4-way handshaking.
Provides data flow control and congestion control.
- Flow control: prevents receiver buffer overflow.
- Congestion control: prevents an excessive increase in the number of packets in the network.
Provides full-duplex, point-to-point service (bidirectional transmission and reception).
Used for cases where reliability is important, such as file exchange.

Provides a connectionless service.
Has low reliability.
The order of data transmission can change.
Does not confirm whether data was received; there is no process like 3-way handshaking.
Has a faster transmission speed than TCP.
Mainly used for streaming, where real-time delivery is important.
Supports 1:1, 1:N, and N:M communication.