Cover -- Preface -- Contents -- 1. Information Technology in 21st Century -- Introduction -- Recent Progress of Computer Technologies -- Current and Future Communication Technologies -- Local Loop Transport Technology -- Multimedia Communication and Conferencing Standards -- UTN Personal Communication -- From 2G to 3G -- e-Business and e-Commerce -- Knowledge Age and Management -- 2. Network and Internet Technology -- History Behind Computer Network -- Objective of Networking -- Functions and Scopes of Networks -- Introduction of Internet -- Protocol -- Switching Techniques -- Layered Protocol -- OSI Protocol -- HDLC/SDLC Frame of Data Link Layer -- Error Control -- Control Field -- Other Protocols -- TCP/IP Protocols -- IP Header Descriptions -- Unregistered or Private Address Space -- Subnet Mask -- Classless Addressing and Routing -- Option Fields of IP -- Description of TCP Headers -- UDP Headers -- Address Resolution Protocol -- Proxy ARP -- Reverse Address Resolution Protocol -- IPv4 to IPv6 -- How Did IPv6 Come Up -- IPv6 in Details -- Details on Use of Extension Headers -- ICMP -- BOOTP -- DHCP -- IPv4 and IPv6 Address Compatibility -- Dual Stack/Tunneling -- Objective Type Questions -- Domain Name Service -- Voice Over Internet or Internet Telephony -- Technical Problems of Voice Packet Transmission Over Internet -- IPv6 for Real Time Services -- Physical Layer Interface -- Transmission Media Option -- 3. Advanced Error Control Techniques in Network -- Introduction -- Basic BEC Techniques -- Different Modified Techniques -- Sastry's Scheme and Morris Modification -- Other Modifications -- Two Level Coding -- Parity Selection in Two Level Coding -- Packet Combining Scheme -- Modified Packet Combining Scheme -- ARQs for Variable Error Rate Channels -- YAO Technique -- Chakraborty's Techniques -- New Schemes.

ARQ Schemes Under Practical Situations: -- GBN and SRQ under different schemes -- Issues of sending different signal waveforms for repeated retransmitted copies -- Application of Multilevel Coding Scheme in Variable Error Rate Channel -- Majority Technique -- Analysis of the Majority Scheme for SW ARQ -- 4. Data/Network Security Techniques and Approaches -- Data or Information Security Introduction -- Cryptography -- Conventional Encryption -- Classical Cipher -- Substitution Codes -- Transposition Codes -- Crypanalysis of Classical Ciphers -- General Attacks -- Secret and Private Key Cryptography -- Stream Cipher -- Block Ciphers -- DES -- Modes of Operation of DES -- Automatic Variable Key -- Proof of DES -- Merits and Demerits of DES -- Qualification of Performance -- Triple DES -- International Data Encryption Algorithm -- Advanced Encryption Standard -- Comparisons of Secret Key Cryptosystems -- Modes of Operations of AES -- Limitations of AES -- Limitations of Secret or Private Key Cryptography -- Key Transport Protocol -- Needham-Schroeder Protocol -- Key Agreement Protocol -- Diffie-Hellman Protocol -- Station to Station Protocol -- Merkles's Puzzle Technique of Key Agreement -- Quantum Security -- Public Key Cryptography -- Public key Cryplographic Algorithms -- RSA Algorithm -- Key Design Under RSA Algorithm -- RSA Encyption Function -- Decryption Function -- How Does RSA Work/Work/Proof of RSA -- How Secure is RSA -- Limitations of RSA Algorithm -- Trapdoor Knapsack Problem -- McElience's Public Key -- Comparison of RSA and TRAP DOOR Public Key Cryptosystems -- Public Key Cryptographic Mechanisms -- Digital Signature under RSA algorithm -- Check Functions for Authenticity, Integrity and Norepudiation of the Message Content -- Illustrate the Non-repudiation by Digital Signature of RSA -- Strength of Mechanism -- PGP (Pretty Good Privacy).

Modern Crypto Systems -- Integrated Solution for Error and Security -- Internet Security -- 5. Reviewing Information, IT and Looking into Future IT -- Information and Knowledge -- Proof of Tom Stonier's Theorem -- Tom Stonier's Theorem With Shannon's Theorem -- Proposing Laws of Information -- Mass Energy Equivalency -- Present Imbalance in IT Era, Digital Divide -- DD Between the Developed and the Developing -- DD Trend in Future -- DD Between India and China -- DD Within a Country -- DD in Language Zone -- Looking Differently -- Looking into Future IT.