Computer Networks, Fourth Edition is the ideal introduction to computer networks. Renowned author, educator, and researcher Andrew S. Tanenbaum has updated his classic best seller to reflect the newest technologies, including 802.11, broadband wireless, ADSL, Bluetooth, gigabit Ethernet, the Web, the wireless Web, streaming audio, IPsec, AES, quantum cryptography, and more. Using real-world examples, Tanenbaum explains how networks work on the inside, from underlying physical layer hardware up through today's most popular network applications.