802.11 n
Secured wireless networks are networks with, usually, a WAP key. A WAP key is located on the actual modem and/or wireless device, etc. Some setups may allow the creator of the network to establish a password in replacement of a standard WAP key.
People often confuse bandwidth and throughput. 802.11a and 802.11g are the two common standards that have a maximum bandwidth of 54Mbps. The actual maximum throughput you will see on a 54Mbps link will be 20-25Mbps.
WIFI radar apps allow the user to see a display of the actual locations of wireless networks. One is the able to create profiles for the preferred networks.
Throughput
Bandwidth is the measure of range or band of frequencies that a channel or path can handle at a maximum rate. whereas, throughput is the average rate of successful message delivery over a communication channel. and Goodput is simply the changing in throughput rate.
Security.
First you go to settings on the main slide, then you go to WIFI. Then you go to networks and you should hit one of the networks that have NO padlock sign and it will connect. Usually default is the network that is best to use. But not everyone will have that depending on the area they live in.
I'm not sure if there is an actual wireless phone book. It would be a directory of wireless phone numbers, but seeing as how often these numbers change, I don't think there really is a reliable source of a wireless phone directory.
Yes, Central Networks is an actual business with between 5,000 and 10,000 employees. It is in the Utilities industry and based in the United Kingdom.
Actual wireless internet is currently barely, if at all available in the united states. However, you can hook up a wireless router to any Internet Service Provider's internet, and have a home wireless network-- wireless in the home is an equipment issue, not a service provider issue.
Wireless microphones are available as bluetooth sets for phones and actual microphones used for speeches, singing, and various other performances. Sennheiser, Shure, and Audio-Technica are good brands that carry such quality wireless microphones.