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The article explains why browsers limit concurrent connections per domain for performance and security reasons, compares HTTP/1.1 and HTTP/2 handling of these limits, and outlines practical frontend optimization strategies such as domain sharding, CDN usage, resource bundling, and lazy loading.
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.
The article explains how TCP connections are identified by a four‑tuple, why the theoretical maximum client connections are 65,535 due to port limits, how servers can theoretically handle up to 2⁴⁸ connections, and why real‑world concurrency is constrained by memory, file descriptors and port reuse rather than the 65535 port count.