Wednesday, October 15, 2008
Monday, October 13, 2008
Wi-Fi
Wi-Fi is the trade name for the popular wireless technology used in home network, mobile phones, video games and other electronic devices that require some form of wireless networking capability. Wi-Fi is a term for certain types of wireless local area network (WLAN) that use specifications in the 802.11 family. In fact, communication across a wireless network is a lot like two-way radio communication. A computer's wireless adapter translates data into a radio signal and transmits it using an antenna. A wireless router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernet connection. The process also works in reverse, with the router receiving information from the Internet, translating it into a radio signal and sending it to the computer's wireless adapter.
Wi-Fi has gained acceptance in many businesses, agencies, schools, and homes as an alternative to a wired LAN. Many airports, hotels, and fast-food facilities offer public access to Wi-Fi networks that known as a hot spots. An interconnected area of hot spots and network access points is known as a hot zone. Wi-Fi network can be susceptible to access by unauthorized users who use the access as a free Internet connection. The activity of locating and exploiting security-exposed wireless LANs is called wardriving. Wardriving is the act of searching for Wi-Fi wireless networks by a person in a moving vehicle, using a portable computer or PDA.
With one wireless router is enough because it can connect multiple computers to each other and the internet without any cable connecting to each computer. Wireless is one superficial to everyone.
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