Wireless internet services enable you to connect to the web without the use of a physical connection (that is, a cable) to your computer. Such networking technologies transmit data using high frequency radio waves, microwave or infrared signals transmitted from an access point that makes the physical connection to the net.These can range from global data networks (that use satellites to connect across very large distances), wide area networks (WANs) that connect large geographical areas, such as links between cities to small local area networks, such as an office building or personal area networks that operate in a relatively small area such as a home.Advances in telecommunications technology mean that cellular phone networks now also transmit data in addition to providing telephone voice services. This means that advanced mobile phones, also referred to as smart-phones can be used browse the web directly or to provide a link to a personal computer for internet access.These technologies enable mobile computing which means that users can be online whenever they are within range of a wireless signal. With the increasing popularity of the Wi-Fi standard users can implement a home network to connect computers and various peripherals for relatively low cost.For businesses, it provides a convenient means of connecting office buildings and other locations (such as warehouses) without having to go to the expense and disruption of installing wiring between them. Many cities provide free wireless links to the internet within the CBD as well as at airports and other transport hubs. Many community organizations and municipal bodies have also established such networks for the use of their residents.The network is usually implemented by creating a point to point connection at the center of the area in which service is to be provided. A transmitter is then installed at an elevated point in this area. Users can then use a dish or antenna to receive the signal, usually pointing to the provider’s transmitter or otherwise ensuring that it is within its transmission range.Wireless networks are particularly advantageous in remote locations where it would otherwise be difficult to provide a physical link to the network. In these cases, access is provided using the GSM mobile phone network coverage or, for very remote locations, using satellite communication technology.Providers can offer wireless internet access at speeds that rival DSL delivered through fixed telephone lines and have comparable latency to other terrestrial broadband networks. These providers sometimes also provide additional services such as access to specialized content, VoIP or virtual private networking.One of the advantages of wireless internet services provided through GSM is that they are portable and do not tie a user to a particular location or network access point. Delivering the internet through the GSM network means that a user has access wherever there is cell phone coverage. In addition, since most service providers cannot provide global coverage through their own GSM infrastructure, many have agreements with other providers to offer a ‘roaming’ service which means users can use other provider’s networks.
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