They are commonly used to allow access to the Internet or a computer networks without the need for a cabled connection. Wifi is commonly used in airports , Offices etc
How Wifi Works?
The communication device which has a wireless compatibility ( laptops )converts the data in the form of radio waves and transmits it to the router, through an antenna. The router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernet connection.
What’s the Risk?
Although its name implies that it is as secure as a wired connection, WEP has been demonstrated to have numerous flaws and has been deprecated in favor of newer standards such as WPA2.
WPA And WPA 2
The Alliance defined these in response to serious weaknesses researchers had found in the previous system, WEP
How to Secure Your Wireless Network
2.Use strong passwords , which can not be cracked easily by using a dictionary attack or brute force attack.
3. Always Use a Vpn when your using pubic Wifi hotspots.Hope this Information Helps You , For further doubts and clarifications please pass your comments