No handshake, no data. If you are waiting longer than 3 seconds for "The Moment" to finish, you have a network latency or packet loss issue. Did you actually mean a different term like "TRIP" (telephony), "SCRIP" (scripting), or a specific proprietary software? If so, reply with the context, and I will correct this guide.
tcpdump -i eth0 'tcp[tcpflags] & (tcp-syn|tcp-ack) != 0' -c 10 Look for the color-coded packets: SYN (Red), SYN-ACK (Blue), ACK (Green). | Your Goal | Look for this state | | :--- | :--- | | Successful connection | ESTABLISHED | | Waiting for server | SYN_SENT | | Waiting for client finalization | SYN_RECEIVED | | Connection failed | CLOSED or RST |
If you are troubleshooting a network error, a slow website, or a failed connection, you are looking for "The Moment TCRIP" — likely meaning the TCP/IP Three-Way Handshake .
| Step | Packet Type | Direction | Meaning | | :--- | :--- | :--- | :--- | | | SYN | Client -> Server | "I want to talk. Here is my sequence number (x)." | | 2 | SYN-ACK | Server -> Client | "Okay, I'm listening. I see your number (x+1). Here is mine (y)." | | 3 | ACK | Client -> Server | "Got it. Here is your number (y+1). Let's send data." |
Corrected Term: