Chapter 2. Telecommunications and Network Security

OBJECTIVES

Identify the key areas of knowledge of telecommunications and network security.

Explain the International Standards Organization/Open Systems Interconnection (ISO/OSI) layers and characteristics including:

  • Physical layer

  • Data Link layer

  • Network layer

  • Transport layer

  • Session layer

  • Presentation layer

  • Application layer

  • The ISO/OSI seven-layer model defines the fundamental aspects of how all network communication occurs. The seven layers are presented as a framework that networking vendors use to ensure interoperability between platforms and protocols. Understanding how network communications is defined allows the security professional to understand where the implications of security exploits ...

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