TCP

• Handshake - SYN - Why the first step is called SYN? Because the sequence number is synchronized between two sides. - SYN - ACK - ACK
• ISN: Initial Sequence Number
• Port Number emphemeral port
• TCP options are only available in handshake
• TCP Flags

Resources

• RFC791
• https://www.youtube.com/watch?v=rmFX1V49K8U