Data communications : from basics to broadbandUpplaga 3

The scope, clarity, and readability of the latest edition of this widely used book make data communications accessible to the novice and yet at the same time challenging enough for the engineer or technical professional. By drawing on practical examples to explain technical concepts, this book demystifies data communications. It introduces the language of data communications, making the reader literate in relevant terminology, concepts, hardware, software, protocols, and architectures. The text begins with a thorough introduction to telecommunications. It then progresses logically from basic concepts to transmission and interface standards, data integrity, security, architectures, protocols, and networking. The third edition concludes with perspectives on current and future trends in digital telecommunications. New features in third edition: Provides enhanced coverage of the Internet: Access technologies, like Digital Subscriber Line (DSL), cable modems, and ISDN lines; Intranets versus the Internet, thin clients, and network computers Includes expanded coverage of protocols: TCP/IP, SMTP, MIME< HTTP, Telnet, Rlogin, FTP, UDP, SNMP, SLIP, and PPP Describes the latest high-speed LAN environments: Fast Ethernet, Gigabit Ethernet, High-Speed Token Ring, and Layer 2-4 switching Expands the coverage of network management: SNMP and RMON Describes mechanisms used to enhance security: S/MIME, SSL, IPSec, and virtual private networks Provides enhanced coverage of wireless networks: AMPS, ETACS, EDMA, TDMA, and GSM Provides updates on interface and transmission technology: V.90-56 kbps modems versus traditional modems, USB and Firewire interfaces, and WDM Explains changes in the telecommunications industry Expands the glossary to include over 1,100 terms and acronyms Offers a Companion Website with supplemental material