TCP vs UDP

1. TCP vs UDP

• TCP: Reliable, connection-oriented → makes sure data arrives correctly and in order.
• UDP: Fast, connectionless → sends data without establishing a connection or guaranteeing delivery.

2. Handshake

• TCP uses a 3-way handshake: SYN → SYN-ACK → ACK to establish a connection between client and server.
• UDP has no handshake — it can start sending data immediately.

3. Congestion Control

• TCP continuously monitors the network and adjusts how much data it sends to avoid overwhelming the network.
• UDP generally doesn't perform TCP-style congestion control, so applications using UDP must handle traffic control themselves if needed.