DECnet-VAX Internals

This document provides a detailed overview of the DECnet-VAX Internals, focusing on supplemental listings. It breaks down the internal workings by layer, covering DDCMP Message Formats, Router Layer Message Formats, and NSP (ECL) Message Formats. It also details Session Control Layer Messages, Network Information and Control Exchange Protocol, and DECnet-VAX SDL Files, including specific file definitions like DLEDEF, NETCTL, NETNPAGED, NETUSR, XWBDEF, PSIUSR, and others. The document serves as a technical reference for understanding the protocols and structures within the DECnet-VAX system.