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Encyclopedia > Wireless network

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Wireless network refers to any type of computer network that is wireless, and is commonly associated with a telecommunications network whose interconnections between nodes is implemented without the use of wires, such as a computer network (a type of communications network).[1] Wireless telecommunications networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves, such as radio waves, for the carrier and this implementation usually takes place at the physical level or "layer" of the network.[2] A computer network is an interconnection of a group of computers. ... For other uses, see Wireless (disambiguation). ... A telecommunications network is a network of telecommunications links arranged so that messages may be passed from one part of the network to another over multiple links. ... This article or section is in need of attention from an expert on the subject. ... A computer network is an interconnection of a group of computers. ... Electromagnetic radiation or EM radiation is a combination (cross product) of oscillating electric and magnetic fields perpendicular to each other, moving through space as a wave, effectively transporting energy and momentum. ... Radio waves are electromagnetic waves occurring on the radio frequency portion of the electromagnetic spectrum. ... This article or section does not adequately cite its references or sources. ... Contents 1 Types 1.1 Wireless LAN 1.2 Wireless MAN 1.3 Mobile devices networks 2 Uses 3 Environmental concerns and health hazard 4 See also 5 References 6 External links [edit] Types [edit] Wireless LAN Wireless Local Area Network (WLAN) is similar to other wireless devices and uses radio instead of wires to transmit data back and forth between computers on the same network. The notebook is connected to the wireless access point using a PC card wireless card. ... Screenshots of Wi-Fi Network connections in Microsoft Windows. Figure 1, left, shows that not all networks are encrypted (locked unless you have the code, or key), which means anyone in range can access them. Figures 2 and 3, middle and right, however, show that many networks are encrypted. Wi-Fi: Wi-Fi is a commonly used wireless network in computer systems which enable connection to the internet or other machines that have Wi-Fi functionalities. Wi-Fi networks broadcast radio waves that can be picked up by Wi-Fi receivers that are attached to different computers or mobile phones. Fixed Wireless Data: Fixed wireless data is a type of wireless data network that can be used to connect two or more buildings together in order to extend or share the network bandwidth without physically wiring the buildings together. Image File history File links Size of this preview: 800 × 203 pixelsFull resolution (1981 × 503 pixel, file size: 95 KB, MIME type: image/png)screenshot to demonstrate wireless networks that are secured / unsecured This is a screenshot of copyrighted computer software, and the copyright for its contents is most likely... Image File history File links Size of this preview: 800 × 203 pixelsFull resolution (1981 × 503 pixel, file size: 95 KB, MIME type: image/png)screenshot to demonstrate wireless networks that are secured / unsecured This is a screenshot of copyrighted computer software, and the copyright for its contents is most likely... Screenshot of a KDE desktop. ... Windows redirects here. ... Wi-Fi (IPA: ) is the common name for a popular wireless technology used in home networks, mobile phones, video games and more. ... There are very few or no other articles that link to this one. ... [edit] Wireless MAN Wireless Metropolitan area networks are type of wireless network that connects several Wireless LANs. A wireless metropolitan area network (MAN) offers broadband network access via exterior antennas. ... WiMAX is the term used to refer to wireless MANs and is covered in IEEE 802.16d/802.16e. Official WiMax logo WiMAX, the Worldwide Interoperability for Microwave Access, is a telecommunications technology aimed at providing wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access. ... [edit] Mobile devices networks Global System for Mobile Communications (GSM): The GSM network is divided into three major systems which are :the switching system, the base station system, and the operation and support system (Global System for Mobile Communication (GSM)). The cell phone connects to the base system station which then connects to the operation and support station; it then connects to the switching station where the call is transferred where it needs to go (Global System for Mobile Communication (GSM)). This is used for cellular phones, is the most common standard and is used for a majority of cellular providers.[3] Personal Communications Service (PCS): PCS is a radio band that can be used by mobile phones in North America. Sprint happened to be the first service to set up a PCS. D-AMPS: D-AMPS, which stands for Digital Advanced Mobile Phone Service, is an upgraded version of AMPS but it is being phased out due to advancement in technology. The newer GSM networks are replacing the older system. The Global System for Mobile communications (GSM: originally from Groupe Spécial Mobile) is the most popular standard for mobile phones in the world. ... Personal Communications Service or PCS is the name for the 1900-MHz radio band used for digital mobile phone services in Canada and the United States. ... IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS). ... [edit] Uses An embedded RouterBoard 112 with U.FL-RSMA pigtail and R52 mini PCI Wi-Fi card widely used by wireless Internet service providers (WISPs) in the Czech Republic. Wireless networks have had a significant impact on the world as far back as World War II. Through the use of wireless networks, information could be sent overseas or behind enemy lines easily, effieciently and more reliably. Since then wireless networks have continued to develop and its uses have significantly grown. Cellular phones are part of huge wireless network systems. People use these phones daily to communicate with one another. Sending information over seas is possible through wireless network systems using satellites and other signals to communicate across the world. Emergency services such as the police department utilize wireless networks to communicate important information quickly. People and businesses use wireless networks to send and share data quickly whether it be in a small office building or across the world.[4] A router, an example of an embedded system. ... It has been suggested that this article or section be merged into RF connector. ... Mini PCI Wi-Fi card Type IIIB Mini PCI is a standard for a computer bus for attaching peripheral devices to a computer motherboard and is an adaptation of the Peripheral Component Interconnect (PCI) bus. ... Wi-Fi (IPA: ) is the common name for a popular wireless technology used in home networks, mobile phones, video games and more. ... For other uses, see Wireless (disambiguation). ... This article or section does not cite any references or sources. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000... Cellular redirects here. ... Emergency services are public services that deal with emergencies and other aspects of Public Safety. ... Another important use for wireless networks is as an inexpensive and rapid way to be connected to the Internet in countries and regions where the telecom infrastructure is poor or there is a lack of resources, like most developing countries. A developing country is a country with low average income compared to the world average. ... Compatibility issues also arise when dealing with wireless networks. Different components not made by the same company may not work together, or might require extra work to fix compatibility issues. Wireless networks are typically slower than those that are directly connected through an Ethernet cable. Ethernet is a large, diverse family of frame-based computer networking technologies that operate at many speeds for local area networks (LANs). ... A wireless network is more vulnerable because anyone can try to break into a network broadcasting a signal. Many networks offer WEP - Wired Equivalent Privacy - security systems which have been found to be vulnerable to intrusion. Though WEP does block some intruders, the security problems have caused some businesses to stick with wired networks until security can be improved. Another type of security for wireless networks is WPA - Wi-Fi Protected Access. WPA provides more security to wireless networks than a WEP security set up. The use of firewalls will help with security breaches which can help to fix security problems in some wireless networks that are more vulnerable. Wired Equivalent Privacy (WEP) is a deprecated algorithm to secure IEEE 802. ... Wi-Fi Protected Access (WPA and WPA2) is a class of systems to secure wireless (Wi-Fi) computer networks. ... [edit] Environmental concerns and health hazard In recent time there are increased concerns and research linking usage of wireless communications with poor concentration, memory loss, nausea, premature senility and even cancer.[5] Questions of safety have been raised, citing that long term exposure to electromagnetic radiation of the sort emitted by wireless networks may someday prove to be dangerous.[6] [edit] See also Exposed terminal problem Physical layer Public Safety Network Wireless community network Warchalking Wireless LAN Wireless LAN client comparison In wireless networks, the exposed node problem occurs when a node is prevented from sending packets to other nodes due to a neighboring transmitter. ... This article does not cite any references or sources. ... A Public Safety Network is a wireless communications network used by emergency services organizations, such as police, fire and emergency medical services, to prevent or respond to incidents that harm or endanger persons or property. ... This article or section does not cite its references or sources. ... Warchalking symbols Warchalking is the drawing of symbols in public places to advertise an open Wi-Fi wireless network. ... The notebook is connected to the wireless access point using a PC card wireless card. ... There are many Wireless Lan (WLAN)Clients available for use. ... [edit] References ^ Overview of Wireless Communications. cambridge.org. Retrieved on 2008-02-08. ^ Getting to Know Wireless Networks and Technology. informit.com. Retrieved on 2008-02-08. ^ Global System for Mobile Communication (GSM). iec.org. Retrieved on 2008-02-08. ^ History of Wireless. jhsph.edu. Retrieved on 2008-02-08. ^ Wi-Fi: Children at risk from 'electronic smog'. news.independent.co.uk. Retrieved on 2008-02-08. ^ Canadian university says no to WiFi over health concerns. arstechnica.com. Retrieved on 2008-02-08. 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 39th day of the year in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 39th day of the year in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 39th day of the year in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 39th day of the year in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 39th day of the year in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 39th day of the year in the Gregorian calendar. ... [edit] External links Wireless at the Open Directory Project Securing a Wireless Network Categories: Wireless networking The Open Directory Project (ODP), also known as dmoz (from , its original domain name), is a multilingual open content directory of World Wide Web links owned by Netscape that is constructed and maintained by a community of volunteer editors. ...

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	Wireless network - Wikipedia, the free encyclopedia (1670 words) A wireless network is a telephone or computer network that uses radio for the carrier or physical layer. The military found use for this wireless technology is configured the wireless signals to send data that was heavily encrypted making it difficult to be cracked which proved to be especially useful during World War II for the Army and Navy (History of Wireless). Wireless networks in terms of internet connections, are typically slower than those that are directly connected through an Ethernet cable. Wireless mesh network - Wikipedia, the free encyclopedia (736 words) In a traditional wireless network where laptops connect to a single access point, each laptop has to share a fixed pool of bandwidth. However, one feature of wireless mesh networks is that an operator need only deploy a minimal base station infrastructure, and allow the users themselves to extend the network. Since this wireless Internet infrastructure has the potential to be much cheaper than the traditional type, many wireless community network groups are already creating wireless mesh networks.
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