Architect's Guide
Sep 28, 2023 · Fundamentals
Understanding the Maximum Concurrent TCP Connections and the Meaning of Port 65535
This article explains how TCP connections are identified by a four‑tuple, clarifies why the theoretical limit of 65,535 ports does not restrict server concurrency, and discusses the practical factors such as memory and file descriptor limits that determine the real maximum number of simultaneous TCP connections on a Linux system.
LinuxTCPconcurrent connections
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