KEY BENEFIT : An emphasis on application-layer paradigms and application programming interfaces, encourages a lively, hands-on experience with protocols and networking concepts. KEY TOPICS : Computer Networks and the Internet; Application Layer; Transport Layer; Network Layer; Link Layer and LANs; Wireless and Mobile Networks; Multimedia Networking; Security in Computer Networks; Network Management; New discussions of VPN, IPsec, VLAN and updated technology treatment. MARKET : A useful reference for computer networking professionals.