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Wi-Fi – Wireless Fidelity

Wi-Fi is a popular technology that allows to connect computers over a network without wires. Basically it’s a Wireless Network. IT is also called as WLAN – wireless Local Area Network that are based on the IEEE (Institute of Electrical and electronics Engineers)

You was found Wi-Fi access in many colleges, offices, airport, hotels. These are WiFi hotspots.

How Wi-Fi works ?

  1. Basically, WiFi uses radio waves to transmit the information just like cell phone, television and radio. Here's what happens:
  2. When any computer wants to transmit data it’s  wireless adapter translates data into a radio signal and transmits it using an antenna.
  3. A wireless router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernet connection.
  4. 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.
  5. The radio waves used for WiFi communication are similar of Cell phones and Radio, but the only difference is that they transmit at frequencies of 2.4 GBz or 5 GHz which is higher and have capacity to carry more data. They use 802.11 networking standards.

How to connect to the Internet from a WiFi hotspot.

If you want to start wireless network, make sure that your laptop has WiFi, otherwise you have to use wireless adaptor. For desktop computer there is plug in WiFi card.

Use a good wireless router. Most router covers area about 100 ft. in all direction. But wall and doors can block signals. So make such a arrangement that you can get full single on your devices.

Now follow the steps:

Note: Some setting will vary depending on your router.

  1. First connect your wireless router to cable modem or DSL modem.
  2. To configure your wireless router open Internet Explorer and type the IP address. (Generally it is for D Link and for other it is
  3. Type the username and password which is default admin.
  4. Follow the setup wizard prompts to set your password, time zone and type of connection.
  5. You'll choose "Dynamic IP" connection unless you've purchased a static IP from Comcast. Remember to put unique strong password.
  6. Provide a "Host Name" and do not change the default MAC address. D-Link recommends you leave the default settings in all connection fields unless Comcast provided different settings when you established your account.
  7. Check the "Enable Wireless" box in the setup wizard. Type in a network name and passphrase and choose a security mode from the drop-down options provided.

To keep your network private, you can use one of the following methods:

Wired Equivalent Privacy (WEP): WEP was included as the privacy component of the original IEEE 802.11 standard ratified in September 1999. In WEP security involves signing on with a password

WiFi Protected Access (WPA) and WiFi Protected Access II are the security protocol to secure wireless network developed by Wi-Fi alliance. WPA improves on the authentication and encryption features of WEP (Wired Equivalent Privacy). As with WEP, WPA security involves signing on with a password. 

Media Access Control (MAC) address filtering is a little different from WEP or WPA. It doesn't use a password to authenticate users -- it uses a computer's physical hardware. Each computer has its own unique MAC address. MAC address filtering allows only machines with specific MAC addresses to access the network. You must specify which addresses are allowed when you set up your router. This method is very secure, but if you buy a new computer or if visitors to your home want to use your network, you'll need to add the new machines' MAC addresses to the list of approved addresses. The system isn't foolproof. A clever hacker can spoof a MAC address -- that is, copy a known MAC address to fool the network that the computer he or she is using belongs on the network.

For most users, leave the default settings and click through to the end of the setup wizard.

Close the web browser. Any computer with wireless access should now be able to connect to your new wireless network using the network name and passphrase you specified.

What is Wi-Fi ?

Feb. 13 , 2013  / Posted By - Kiran Patil