radio frequency
You need to contact a wireless network provider. Use a search engine, type in "wireless networks + the name of your city" and tap search.
Physical Media Twisted-Pair Cable Coaxial Cable Fiber-Optic Cable Wireless Media Broadcast Radio Cellular Radio Microwaves Communication Satellite
Wireless networks aren't as fast as wired networks. Their not as reliable either, or as secure. The only reason people use them is for the convienence of not being restricted by a wire.
The common wireless frequency is 2.4 Ghz. Some wireless networks may use the 5 Ghz frequency range.
First of reboot your computer, second try to update the driver for your wireless adapter. Also make sure that you are allowed to connect to those findable networks. If you can see the networks it does not mean that you can connect to it. Many people use secured wireless networks which protects networks from unauthorized access.
Radio frequency signals.
signal transmitted from transmitter to rfecevier is known as media transmission media divided in to two types guided unguided Transmission Media: All network nodes (computers and peripherals) are connected to each other and to the network by transmission media. A transmission medium establishes a communications channel between the nodes on a network and can take several forms: a. Networks can use existing wiring such as power lines b. Networks canuse additional cable to connect nodes c. Wireless networks use radio waves instead of wires or cable to connect nodes.
Yes, you can. Wireless N devices are reversely compatible with G networks.
Radio Waves
Wireless modems best way.
IrDA
There are always a chance of rasclart hackers!