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CISSP For Dummies, 4th Edition by Peter Gregory, Lawrence Miller

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Wireless Network (WLAN) Security

Both residential and business wireless local area networks (WLANs) have proliferated around the world and are often an inviting target for attackers, whether those attackers want to compromise your data or resources, or simply get free access to the Internet.

The CISSP candidate should understand the basic WLAN components and architectures, and various WLAN security protocols and their vulnerabilities.

WLAN components and architectures

The basic components of a WLAN (also known as a WiFi network) include client devices, wireless network cards, and wireless access points (APs).

Client devices and wireless cards

Client devices in a WLAN include desktop and laptop PCs, PDAs, and other mobile devices (such as smartphones, iPhones, medical devices, and barcode scanners). Wireless network interface cards (WNICs), or wireless cards, come in a variety of form factors such as PCI adapters, PC cards, and USB adapters, or they are built into wireless-enabled devices, such as laptop PCs, PDAs, and smartphones.

Access points (APs)

Wireless access points (APs) are transceivers that connect wireless clients to the wired network. Access points are base stations for the wireless network. They’re essentially hubs (or routers) operating in Half-Duplex mode — they can only receive or transmit at a given time; they can’t do both at the same time. Wireless access points also need antennas so that they can transmit and receive data. The four basic types of wireless antennas ...

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