Data communications : from basics to broadband Upplaga 4

The latest edition of this widely used book continues to present technical concepts in a clear and readable manner, making data communications accessible to everyone. By drawing on practical examples to explain technical concepts, this book demystifies data communications and the open standards-based technology behind the Internet. 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 interface and transmission standards, data integrity, security, architectures, protocols, and networking. The fourth edition concludes with perspectives on current and future trends and the convergence of voice and data communications technologies. New features in the fourth edition: Provides enhanced coverage of the Internet, search engines, Web servers, load balancing, Web storage, chat, instant messaging, browsing, Web backup, streaming media, and access technologies Describes the latest corporate and home LAN environments, including Fast Ethernet, Gigabit Ethernet, and Ten Gigabit Ethernet Covers the latest IEEE 802.11 a/b/g Wi-Fi wireless LAN standards Includes expanded coverage of protocols: TCP/IP, SMTP, MIME, HTTP, Telnet, FTP UDP, SNMP SLIP, PPP, ARP ICMP, DNS, DHCP, MPLS, POP3, IMAP4, Mobile IP SSL, IPSec, PPTP, SIP, and many others Offers an in-depth security discussion of relevant threats, defense mechanisms, and encryption technology Explains changes in the telecommunications industry and Voice over IP Describes the latest high-speed interface and transmission technologies Provides enhanced coverage of cellular 1G/2G/2.5G/3G technologies Expanded glossary includes more than 1,350 terms and acronyms Offers a companion website for students, as well as a dedicated instructor's website with numerous instructional resources