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After DNS finds the server's IP address, how does the browser open a TCP connection?

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  1. It sends the whole page request at once
  2. A single PING message
  3. A three-way handshake: SYN, SYN-ACK, ACK

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References

  1. MDN: How browsers work developer.mozilla.org/en-US/docs/Web/Performance/Guides/How_browsers_work Checked 2026-10-11.

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