This and the next chapter will cover foundational concepts in network architecture and network security. IP and non-IP protocols, their application, threats, attacks, vulnerabilities, and countermeasures are covered with suitable examples. Wireless networks and the security requirements are also covered. The application of cryptography in communication security is covered with illustrations. Concepts related to securing network components are also covered.
The communication and network security domain deals with the security of voice and data communications through local area, wide area, and remote access networking. The focus here is to understand the networking models, such as Open System Interconnect (OSI) and TCP/IP as well as the security mechanisms for Internet/Intranet/Extranet, such as firewalls, routers, and intrusion detection/protection systems. Candidates are expected to have knowledge in the areas of secure communications, securing networks, threats, vulnerabilities, attacks, and countermeasures to communication networks and protocols that are used in remote access.
Observe the following illustration. It gives an overview of communication and network security in the entity-relationship model, and it represents the topics covered in this chapter:
The following bullet points represent a brief overview of the preceding diagram. These points explain the overall structure of this chapter in a logical sequence: