Security+ Training Guide

Understanding the Basic Security Concepts of Network and System Devices

Understand the basic security concepts of network devices.

Network devices—such as routers, firewalls, gateways, switches, hubs, and so forth—create the infrastructure of local area networks (on the corporate scale) and the Internet (on the global scale). Securing such devices is fundamental to protecting the environment and outgoing/incoming communications. You also have to be aware of security risks and controls available in the public switched telephone networks (PSTN) infrastructure because PSTNs are often used for computer communications. This section of the chapter introduces the security concepts applicable to physical devices, network topologies, and storage media. ...