Computer Communication Connections (e.g. Bluetooth, Infrared, Cellular Wan, Wifi)

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Summary:
With the recent advent of wireless communications, several wireless technologies have come to the fore. Notable among these are Blue tooth, Infrared, Wimax, and WiFi. Each of these communications methods is discussed in the article.

Body:

With the recent advent of wireless communications, several wireless technologies have come to the fore. Notable among these are Blue tooth, Infrared, Wimax, and WiFi. Each of these communications methods is discussed in the article.

Bluetooth:
Bluetooth bandwidth is up to 2.1Mbps for version 2.0, and its range is only 10 meters (30 feet). Devices with a Bluetooth radio and an antenna can speak to each other with little or no preparation. For example, conference attendees can readily transfer files across a table using their Bluetooth-enabled notebooks. You can also send a file to a Bluetooth-enabled printer without downloading drivers. Bluetooth may soon be a standard interface on many cell phones, handheld computers, and even home appliances. Bluetooth operates at 2.4GHz.
Infrared:
Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation. It is a line of sight communication, and any obstruction to line of sight is going to disrupt communication. One every day use of IR communication is your television remote. Most tv remotes use IR communication, and requires line of sight.
Wimax:
WiMAX (short for Worldwide Interoperability for Microwave Accessis), a wireless digital communications system, also known as IEEE 802.16, that is intended for wireless "metropolitan area networks". WiMAX can provide broadband wireless access (BWA) up to 30 miles (50 km) for fixed stations, and 3 - 10 miles (5 - 15 km) for mobile stations. In contrast, the WiFi/802.11 wireless local area network standard is limited in most cases to only 100 - 300 feet (30 - 100m).
WiFi:
Wi-Fi (short for "wireless fidelity") is used for wireless local area networks (WLAN) and fully described in the 802.11 family of specifications. The term Wi-Fi was created by an organization called the Wi-Fi Alliance, which oversees tests that certify product interoperability. A product that passes the alliance tests is given the label "Wi-Fi certified" (a registered trademark). Wi-Fi network can be susceptible to access by unauthorized users if not protected adequately. The activity of locating and exploiting security-exposed wireless LANs is called war driving. Homes or Organizations that use a wireless LAN should secure the WLAN by using Wired Equivalent Privacy (WEP) encryption standard, or Wi-Fi Protected Access (WPA) or MAC address filtering.

Read more about wireless communications at A+ Tutorial

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Article Originally Published On: http://www.articlesnatch.com

Tags: wireless communications

, wifi

, bluetooth

, infrared communications

, wimax

, a+ tutorial

, wep security

, wpa security

, simulation exams

, turorials

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