TCP Unused or Broken Protocol Features

3/10 Low

TCP has a long history of unused or broken features (e.g., TCP urgent flag) that add complexity without functional benefit, creating legacy cruft that cannot be removed due to backward compatibility constraints.

TCP
Category
compatibility
Freshness
persistent
Scope
cross_platform
Upstream
wontfix
Recurring
No

Sources

Collection History

Query: “What are the most common pain points with TCP/IP for developers in 2025?”4/9/2026

TCP has some design flaws... Some features, such as TCP urgent, have never worked in practice.

Created: 4/9/2026Updated: 4/9/2026