3. TCP, UDP and the 3 Way Handshake

Layer 4 - Transport Layer

TCP - Transmission Control Protocol - Connection Oriented - High reliability - Websites http(80), https(443), ftp, ssh - works on 3 way handshake - SYN > SYN ACK > ACK - SYN - I want to connect on port 443 - SYN ACK - If port is open and available for connection - ACK - when you want to establish connection

UDP - User Datagram Protocol - Connectionless - Streaming, DNS, VOIP