MissionOpen a reliable connection to
Open a reliable connection to 93.184.216.34:443 — complete the three-way handshake, then close it cleanly.
connection_control.tcp
CLOSED
client 10.0.0.5:49152 ISN 0server 93.184.216.34:443 ISN 0
SYN sent
SYN-ACK received
ACK sent — ESTABLISHED
Think first · step 1 of 7
Nothing is connected yet. What does the client send first, and which number does it include?
sequence · client ↔ server live
segment_log.tcp0 sent
No segments on the wire yet. Press Send SYN to begin the handshake.
What just happened
Every TCP connection begins with a three-way handshake so both sides agree on starting sequence numbers before any data moves.
Mission
Open a reliable connection to 93.184.216.34:443 — complete the three-way handshake, then close it cleanly.
Questions you will answer
- Why does the SYN-ACK acknowledge the client’s ISN + 1?
- Why does opening take three segments but closing takes four?
Read it now and keep it in mind — the answer is in what you are about to watch.