Vulnerabilities, attacks and current defenses and in-depth look at network security. Threats to computer networks through exploiting weaknesses in network design and protocols are analyzed and protection of data confidentiality, integrity and availability throughout the different network services are explored. Topics covered include cryptographic and authentication systems for data protection, network intrusion detection and forensics technologies, network security devices and access control mechanisms, communication privacy and anonymity, and new developments in Internet and Transport Protocols.