“True Blood,” “True Grit,” true wireless
In 1919, the scientist Nikola Tesla wrote an article called “The True Wireless,” in which he presented his controversial criticisms of the current theories on radio communication. When network engineers refer to “true wireless” today, however, they’re usually referring to something much different.True wireless often refers to a wireless wide area network, an alternative to the traditional wireless local area network. A WLAN refers to any network that links devices by a wireless distribution method. Usually, it allows a device to connect to a wireless access point, or router, which is connected to the internet. This is what allows you to connect to the internet in your local Starbuckshowever, it’s not the only way to take advantage of wireless technology.A WWAN differs by its method of transmission and the size of coverage. True to their names, wide area networks cover a larger area than local area networks, and even surpass networks that may cover a campus or city. How do they accomplish this? By connecting to a cellular network to transfer data. These networks are composed of cell sites, just like phone networks, and use towers, transceivers, digital signal processors, and a variety of other regulatory devices to transfer data. Examples of such technologies include:
- WIMAX
- UMTS
- GPRS
- EDGE
- CDMA2000
- GSM
- CDPD
- Mobitex
- HSDPA
- HSUPA
- 3G
Local Multipoint Distribution Service (LMDS) and even the traditional Wi-Fi access method can also be used. Access simply requires a WWAN card, which is now integrated in some modern laptops. Access can be provided by a number ofOne of the benefits of access via radio communication systemsnamely, their lack of physical wiresalso raises security issues. When using a WWAN network, you need to be sure to use encryption methods to increase your browsing securitya good idea no matter how you’re getting connected.