Wireless Network

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Wireless network is indicated to a telecommunication network whose interconnections between nodes are implemented without the use of wires, such a computer network. Nowadays, wireless network has become the important thing in telecommunication. This sort of technology has been used for over a century and remains synonymous with radio. In 19th century, Guglielmo Marconi invented a radio and made his made his mark in the world of wireless technology.

At that moment, Marconi was about to produce detect radio waves from long distance. In 1896, the Wireless Telegraph and Signal Company Limited was established and became the first radio actor in the world. The first wireless signal was sent using Morse Code. Signals were received across the Atlantic in 1905. However, this kind of technology was first introduced during World War II when the army began to sending battle plans over enemy lines and when Navy ships commanded their crew from shore to shore.

As the time goes by, wireless network proved its functions and advantages so businesses and schools have expand their computing arena by improving their wires LAN (local area networks) into wireless LANs. Therefore, wireless technology revolves in every house, classroom and business around the world.

This paper will discuss the type of wireless network, the function, how wireless should be implemented, pros and cons of having wireless network wireless, how this wireless can be managed, what the security issues of wireless technology, when it is to be implemented in institution, and how this can be monitored and controlled.

The Types of Wireless Network
The following are the types of wireless network:
1.CDPD (Cellular Digital Packet Data) is a specification for supporting wireless access to the internet and other public packet-switched networks over cellular telephone networks. CDPD supports TCP/IP and Connectionless Network Protocol (CLNP). CDPD utilizes the RC4 stream cipher with 40 bit keys for encryption. 2.HSCSD (High Speed Circuit Switched Data is a specification for data transfer over GSM networks. HSCSD utilizes up to four 9.6Kb or 14.4Kb time slots, for a total bandwidth of 38.4Kb or 57.6Kb. 3.PDC-P (Packet Data Cellular) is a packet switching message system utilized by NTT DoCoMo in Japan. PDC-P utilizes up to three 9.6Kb TDMA channels, for a total maximum bandwidth of 28.8Kb. 4.GPRS (General Packet Radio Service) is a specification for data transfer on TDMA and GSM networks. GPRS utilizes up to eight 9.05Kb or 13.4Kb TDMA timeslots, for a total bandwidth of 72.4Kb or 107.2Kb. GPRS supports both TCP/IP and X.25 communications. 5.CDMA-2000 1xRTT is a 3G wireless technology based on the CDMA platform. The 1x in 1xRTT refers to 1x the number of 1.25MHz channels. The RTT in 1xRTT stands for Radio Transmission Technology. 6.Bluetooth is a specification for short distance wireless communication between two devices. 7.IrDA defines a standard for an interoperable universal two way cordless infrared light transmission data port. 8.MMDS (Multichannel Multipoint Distribution Service) is a broadband wireless point-to-multipoint specification utilizing UHF (Ultra High Frequency) communications. 9.LMDS (Local Multipoint Distribution Service) is a broadband wireless point-to-multipoint specification utilizing microwave communications. 10.WiMAX stands for Worldwide Interoperability for Microwave Access. WiMAX is a broadband wireless point-to-multipoint specification from the IEEE 802.16 working group. 11.Wi-Fi (802.11) is a suite of specifications for wireless Ethernet. 802.11 securities is a significant concern because 802.11 (Wi-Fi) networks can allow almost undetectable entry into networks.

In implementing Wi-Fi, we have to consider the speed, range, clarity of the signal, price and compatibility. The following are the types of Wi-Fi:
Figure1. Wi-Fi
The standard 802.11a is not very popular among small business or...
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