Networking Essentials / Ports and protocols
Lesson 17 of 30
TCP
TCP is reliable: it sets up a connection with a three-way handshake (SYN, SYN-ACK, ACK), numbers every packet and resends anything lost.
Key points
- Three-way handshake
- Guaranteed order
- Used by web, email, SSH
Quiz · +10 XP
What is the first packet of a TCP handshake?
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