Compared to previous versions, this edition introduced significant updates to reflect the technology landscape of the early 2000s:
Covers the theoretical basis for data communication, including guided transmission media (copper, fiber), wireless transmission, and communication satellites.
For the first time, a full chapter was devoted to network security, covering AES, RSA, quantum cryptography, and IPsec. Andrew S Tanenbaum Computer Networks 4th Edition Pdf
The application layer became the longest chapter, reflecting the importance of the "Wireless Web," PHP, and streaming media. Educational Impact
Material on older, obsolete LAN and WAN protocols that were no longer in widespread use by 2003 was significantly reduced. Educational Impact Material on older, obsolete LAN and
Covers modern end-user services such as email, the World Wide Web, streaming audio, and MP3. Key Updates in the 4th Edition
Extensive new material was added for 802.11, 2G/3G cellular networks, and ad hoc networking. Fourth Edition" Computer Networks
The world's leading introduction to networking— fully updated for tomorrow's key technologies. "Computer Networks, Fourth Edition" Computer Networks, Fourth Edition - Spartans Fall-14