ConceptsWell-Known Ports

Well-Known Ports

Standardized TCP/UDP ports (0-1023) reserved for common services, like 22 for SSH, 80 for HTTP, 443 for HTTPS. Foundational networking knowledge defenders use constantly.

Glossary definition

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Port

The foundation Well-Known Ports builds on, worth understanding first.

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PortStart here

A port is a numbered communication endpoint used by network protocols to identify which service should receive traffic.

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TCP/IP Model

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HTTPS

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Ephemeral Ports

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TCP

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Three-Way Handshake

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UDP

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SSH

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