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Connection timeout.

also: connect timeout · connection timeouts · read timeout · read timeouts

Connect timeout limits establishing the TCP connection; read timeout limits waiting for response data. Both need explicit values.

the two-minute refresher

Connect timeout: how long to wait for the TCP handshake; keep it short (1-5 s).
Read timeout: how long to wait for data once connected; it depends on what the service does.
Forgetting the connect timeout lets an unreachable host hang threads for minutes.

Where the course teaches it

W02 · Day 1Timeout Helllearn it →W02 · Day 1Timeout Hellrevisit →

Related concepts

Timeout budget
TCP three-way handshake