This book fulfills the need for a basic comprehensive text on data communications and networks. This second edition lays emphasis on key topics such as data transmission, transmission media, data compression, security, network types and topologies, Internet and TCP/IP protocol suite.

1.Introduction to Data Communication and networking (existing Chapter-1) 2. Analog and Digital Transmission Methods (existing-3) 3. Modes of Data Transmission and Multiplexing (existing Chapter-4) 4. Transmission Errors: Detection and Correction (existing Chapter-5) 5. Data Compression and Encryption (existing Chapter-6) 6. Transmission Media (existing Chapter-7) 7. Network Topologies, Switching and Routing Algorithms (existing Chapter-8) 8. Networking Protocols and OSI Model (existing Chapter-9) 9. Local Area Networks(LAN), Metropolitan Area Networks (MAN) and Wide Area Networks (WAN) 10. Medium Access Sub Layer and ISDN (renamed; existing Chapter-11) 11. X.25 Protocol (existing Chapter-12) 12. Frame Relay and Congestion Control (renamed; existing Chapter-13) 13. Asynchronous Transfer Mode (ATM) (existing Chapter-14) 14. Wireless Communication (New) 15. Internetworking Concepts, Devices, Internet Basics, History and Architecture (existing Chapter-15) 16. Ways of Accessing the Internet (existing Chapter-16) 17. TCP/IP Part I: An Introduction to TCP/IP, IP, ARP, RARP, ICMP (existing Chapter-17) 18. TCP/IP Part II (TCP, UDP) (existing Chapter-18) 19. TCP-IP Part III (DNS, Email, FTP, TFTP) (existing Chapter-19) 20. TCP-IP Part IV (WWW, HTTP, TELNET) (existing Chapter-20) 21. Multimedia Communications (existing Chapter-21) Appendix A: Internet Protocol Version 6 (Ipv6) Appendix B: Hardware for Error Detection Appendix C: Network Management and Monitoring