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Book tip
Networking fundamentals
- Network+ by Jonathan Feldman; ISBN: 0-7897-2157-0
TCP/IP
- Internetworking with TCP/IP by Douglas E. Comer; ISBN: 0-13-018380-6
SIP and IMS
- SIP Demystified by Camarillo Gonzalo; ISBN: 0-07-137340-3
- The 3G IP Multimedia Subsystem (IMS) by Camarillo Gonzalo and Miguel-Angel García-Martín; ISBN: 978-0-470-51662-1
- Voice-Enabling the Data Network by James Durkin; ISBN: 1587050145
- Internet Communications Using SIP by Henry Sinnreich, Alan B. Johnston; ISBN: 0471413992
- (SIP) Understanding the Session Initiation Protocol by Alan B. Johnston; ISBN: 1580531687
- SIP beyond VoIP by Henry Sinnreich, Alan Johnston, Robert Sparks; ISBN: 0-9748130-0-1
Routing/Switching
- (Routing) Building Scalable Cisco Internetworks (BSCI): Authorized Self-Study Guide by Diane Teare and Catherine Paquet, ISBN-10: 1-58705-223-7
- (Switching) LAN Switching and Wireless by Wayne Lewis, ISBN-10: 1-58713-207-9