In Information Assurance, telecommunications, networks, and Internet Security are essential. Open Systems Interconnection (OSI) promotes interoperability across different types of network devices. Transmission Control Protocol/ Internet Protocol (TCP/IP) allows this interconnectivity. Security services authentication, access control, data confidentiality, data integrity, nonrepudiation, and loggingare needed to protect networks from attack. Data network types include local area networks (LAN), wide area networks (WAN), and the Internet, intranets, and extranets. Devices used for network security include routers, firewalls, and intrusion detection and prevention systems. Virtual private networks (VPNs) provide a kind of tunnel through the Internet that use IP security (IPSec) to perform encryption and authentication to address the lack of security on IP-based networks.

How the structure of the TCP IP framework has enabled the expansion of the Internet into a worldwide network. Discuss issues with this network. Is it big enough? Are enough IP addresses for all? What is being done under IPV6?