Good Books
- Computer Networks by Andrew S. Tanenbaum
- Computer Networks by Uyless Black
- Data Link Protocols by Uyless Black
- X.25 Explained: Protocols for Packet Switching Networks by R. J. Deasington
- Data and Computer Communications by William Stallings
- ISDN and Broadband ISDN With Frame Relay and ATM by William Stallings
- The Handbook of International Connectivity Standards by Gary R. McClain, editor
