RFC 791, "Internet Protocol", September 1981

Note: This RFC has been updated by RFC 1349, RFC 2474, RFC 6864

Errata ID: 8691
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Alan Shultz
Date Reported: 2026-01-01

Section 1.3 says:

The ARPANET address would be derived from the internet address by the local network interface

It should say:

The ARPANET address would be derived from the internet address by the internet module

Notes:

This sentence claims the local net interface translates an IP address into a local net address. The local net interface knows nothing about internet addresses. This translation is the responsibility of layers above the local net.

The later section 2.3, subsection Addressing, makes this explicit:

>The internet module maps internet addresses to local net addresses.

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