WiFi – A Wireless Local Area Network Alternative

WiFi is short for “wireless fidelity” and is a wireless local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet. The WiFi route uses an Ethernet protocol, which is different than using a wired Internet system. The WiFi system is a good alternative to wired LAN systems. Many buildings, airports, hotels and public places now offer WiFi networks so people can have portable access to the Internet. These locations are often called hotspots.

WiFi, also called 802.11 networking or wireless networking, is a good way to handle wireless network. The biggest advantage of using WiFi is it is a simple and portable way to connect to the Internet. Several computers in one location can be connected together without using cables or wires. This is a big advantage to businesses that need several computers to access the web. Computers that connect using a WiFi system will connect to the network utilizing radio tower signals. Computers can still connect to each other via WiFi and still be up to 100 feet apart.

There are some disadvantages of using a WiFi connection. Just as in any radio transmission, a wireless network has the potential for radio interference. This maybe caused by bad weather or interference from other wireless devices. Obstructions, such as walls or buildings, can also cause interference with a WiFi connection. Many users though, feel that the advantages far outweigh the disadvantages.

WiFi connections that work with 802.11b and 802.11g transmissions can transmit waves at 2.4 GHz. The higher frequency allows the higher data rate. A WiFi connection can transmit data up to 100 times faster than a traditional dial-up connection. In addition, a WiFi connection can change frequencies when necessary. The connection is designed to hop the radio bandwidth and is resistant to interference.

Connecting a computer to WiFi is relatively simple. Most new laptops come equipped with a WiFi card built in. Older laptops can also be compatible with WiFi with an added card. To add a WiFi card to a laptop, purchase a PCMCIA card or buy an external adapter and plug it in the USB port. The card and driver are then installed on the computer. After installing, it is necessary to find a hotspot to access the Internet and email services. Most new computers will automatically connect to the hotspot and a connection will be established.

A hotspot will be the connection point for WiFi access. It is a small box that is hardwired into the Internet. It transmits radio waves that are compatible with the WiFi network. Many public places have WiFi hotspots. These can often be found in restaurants, hotels, libraries and airports.

Hotspots can also be created at home. These hotspots in the home can be established by purchasing a Wireless Access Point Router. The Wireless Access Point Router is a box that contains a connection port, a router, an Ethernet hub, a firewall and a wireless access point. Once this is turned on, the hotspot will have coverage of around 100 feet in all directions. Most homes can get adequate coverage throughout the house. Signal boosters can also be purchased to increase the hotspot range. When looking to purchase a WiFi system for the home, the 802.11b is usually less expensive, but it of the lowest quality. The 802.11g cost more, but is fast and works better in most homes.

It is important to remember that WiFi connections can either be open or secure. When a hotspot is open and security is an issue such as when using the network on a regular basis at home, it is necessary to use a WEP or Wired Equivalent Privacy, key to connect. This is a type of encryption system. When using a WEP key, the user will need to enter the code before gaining access to the WiFi network. Using a WEP key ensures that all of the data is protected at the same level as wired networks.

If the computer in use has access to a broadband or dial-up connection there is no additional cost for WiFi access, but does need an attached access point. This is a low cost device used to provide wireless access to media adaptors and laptop computers. Access point devices can cost anywhere from $20 to $300.