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178 Chapter 4 • Communication Security: Wireless

EXAM WARNING
For the Security+ exam it is important to remember that the three main
elements of the WAP programming model are the Client, the Gateway
and the Original Server.

WTLS

The wireless transport layer security (WTLS) is an attempt by the WAP Forum to
introduce a measure of security into the WAP.The WTLS protocol is based on the
Transport Layer Security (TLS) protocol that is itself a derivative of the Secure
Sockets Layer (SSL) protocol. However, several changes were made to these proto-
cols to adapt them to work within WAP.These changes include:

■ Support for both datagram- and connection-oriented protocols
■ Support for long round-trip times

■ Low-bandwidth, limited memory, and processor capabilities
WTLS is designed to provide privacy as well as reliability for both the client
and the server over an insecure network and is specific to applications that utilize
WAP.These applications tend to be limited by memory, processor capabilities, and
low bandwidth environments.

EXAM WARNING

Make sure you fully understand WTLS for the Security+ exam.

IEEE 802.11

The original IEEE 802.11 standard was developed in 1989 and defines the opera-
tion of wireless networks operating in the 2.4 GHz range using either DSSS or
FHSS at the physical layer of the OSI model.The standard also defines the use of
infrared for wireless communication.The intent of the standard is to provide a
wireless equivalent for standards, such as 802.3, that are used for wired networks.
DSSS devices that follow the 802.11 standard communicate at speeds of 1 Mbps

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