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Simple Mail Transfer Protocol (SMTP) The current protocol standard for host-to-host mail transport. SMTP specifies how communication works between a mail server and its end users. Its main function is to facilitate the delivery of e-mail from one server to another. Simple Network Management Protocol (SNMP) A protocol that was developed to provide a standard method of assessing information about the health of a network device as well as remotely configuring the device. switch A device that connects multiple networked devices together, providing each device connected to the switch with full dedicated connections to the other connected devices. See also hub; router.

802.11h

The IEEE 802.11h standard, adopted in 2004, operates at a data transmission rate as high as 54 Mbps and uses radio frequencies in the 5-gigahertz (GHz) range. It extends the IEEE 802.11a standard to enable use in Europe and prevent interference with existing devices.

802.11i

topology Term used in networking to describe the physical placement of computers, cables, hubs, routers, and so forth. Transmission Control Protocol (TCP) A connection-oriented networking protocol; part of the TCP/IP suite of network protocols. Transmission Control Protocol/Internet Protocol (TCP/IP) A suite of protocols for communicating across large routed networks like the Internet; originally developed by the United States Defense Advanced Research Projects Agency (DARPA).

The IEEE 802.11i standard, adopted in June 2004, extends and defines the security parameters used by wireless devices. The original Wired Equivalent Privacy (WEP) method of encryption has proven inadequate and flawed, and an interim standard, Wi-Fi Protected Access (WPA), is incorporated as a subset of IEEE 802.11i, as is the IEEE 802.1x Authentication Protocol. Full support for IEEE 802.11i will likely require new hardware to handle the Advanced Encryption Standard (AES).

Three Types of Applications: What s the Difference , 28 Getting Started with the IDE, 30 Building the Projects, 33

802.11e

The IEEE 802.11e standard, still in draft, defines Quality of Service (QoS) standards for wireless networks, enabling Voice over IP (VoIP) and multimedia streaming on a wireless network.

User Datagram Protocol (UDP) A sister protocol to TCP. Whereas TCP was developed to provide connection-oriented service and a means of error detection and compensation, UDP was designed for maximum throughput. UDP depends on the physical component of the network to be reliable or for other protocols to compensate for any data loss. As a result of this simplicity, UDP has very little communications overhead and is particularly useful when it is more important for data to arrive quickly than reliably, such as in delivering streaming media.

802.11n

The IEEE 802.11n standard, still in its early stages, will define the protocols to be used for wireless speeds greater than 100 Mbps.

The Wi-Fi Alliance was formed in 1999 to certify the interoperability of products that use the IEEE 802.11 standards. The intent was to ensure that the wireless products that had been certified by the Alliance would interoperate successfully with each other, assuming they are on the same frequency and have the same feature set. Over 1500 products have received the Wi-Fi label. The Wi-Fi Alliance also was responsible for the Wi-Fi Protected Access (WPA) standard that was first available in February 2003. WPA provided a necessary interim security standard that is compatible with IEEE 802.11i, but that could be met by existing hardware. WPA ensures a

Telnet An insecure protocol designed to provide remote access to a computer by performing terminal emulation, thus allowing a user to communicate with a computer as though he or she were typing directly at a local console. Telnet is a text-only protocol and is used primarily by UNIX-based systems. Telnet sends all data, including user names and passwords, in clear text; its use should be avoided for security reasons. token passing A technique for controlling network access. With token passing, only one computer at a time possesses the token, which gives it the right to transmit data on the network. Once transmission has successfully occurred, the token is passed to the next computer. The token always moves around the network sequentially, ensuring that all computers have an opportunity to transmit. See also Carrier Sense Multiple Access with Collision Detection. Token Ring A type of network that uses token passing techniques to control network access. See also token passing.

Part III:

high degree of confidence in the security of a well designed wireless network. The newest Wi-Fi Alliance security standard is WPA2, and it fully implements the IEEE 802.11i standard. Products that receive the WPA2 label are certified to interoperate with each other and use AES, allowing for compliance with FIPS 140-2 government security requirements.

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