ipv4

Auto-created stub for singleton broken link [[ipv4]] — referenced once and was missing. Keeps graph connected per AGENTS.md:199.

Per Wikipedia: “To be written.”

Stub — fill with plain language explanation of ipv4.

1. To be written.
2. To be written.
3. To be written.
4. To be written.

• To be written.

• Related: Index — auto stub for singleton [[ipv4]] from wiki/cn/ip-protocol.md

• To be written.
• To be written.