What is Wi-Fi

Wi-Fi is the name of a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections. A common misconception is that the term Wi-Fi is short for “wireless fidelity,” however this is not the case. Wi-Fi is simply a trademarked term meaning IEEE 802.11x.

The Wi-Fi Alliance, the organization that owns the Wi-Fi (registered trademark) term specifically defines Wi-Fi as any “wireless local area network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers’ (IEEE) 802.11 standards.”

Initially, Wi-Fi was used in place of only the 2.4GHz 802.11b standard, however the Wi-Fi Alliance has expanded the generic use of the Wi-Fi term to include any type of network or WLAN product based on any of the 802.11 standards, including 802.11b, 802.11a, dual-band, and so on, in an attempt to stop confusion about wireless LAN interoperability.

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How Wi-Fi Works

How Wi-Fi Works

Wi-Fi works with no physical wired connection between sender and receiver by using radio frequency (RF) technology, a frequency within the electromagnetic spectrum associated with radio wave propagation. When an RF current is supplied to an antenna, an electromagnetic field is created that then is able to propagate through space. The cornerstone of any wireless network is an access point (AP). The primary job of an access point is to broadcast a wireless signal  that computers can detect and “tune” into. In order to connect to an access point and join a wireless network, computers and devices must be equipped with wireless network adapters.

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Wi-Fi Support

Wi-Fi Support

Wi-Fi  is supported by many applications and devices including video game consoles, home networks, PDAs, mobile phones, major operating systems, and other types of consumer electronics.  Any products that are tested and approved as “Wi-Fi Certified” (a registered trademark) by the Wi-Fi Alliance are certified as interoperable with each other, even if they are from different manufacturers. For example, a user with a Wi-Fi Certified product can use any brand of access point with any other brand of client hardware that also is also “Wi-Fi Certified”. Products that pass this certification are required to carry an identifying seal on their packaging that states “Wi-Fi Certified” and indicates the radio frequency band used (2.5GHz for802.11b,  802.11g, or 802.11n, and 5GHz for 802.11a).


WiFi Internet Access Connection Procedure WINDOWS XP

Posted by on Mar 27, 2013 in Knowledge base, wifi | Comments Off on WiFi Internet Access Connection Procedure WINDOWS XP

WiFi Internet Access Connection Procedure WINDOWS XP

The library has provided wireless network service to connect your personal laptop to
the World Wide Web while at your public library.  All you need is a laptop, wireless
adapter and web browser.  There are three steps that you will need to follow in order
to connect your wireless device to the library’s wireless network.

Please be aware that this is not a secure network.  It may be possible for personal
data to be lost, damaged, or stolen while connected to the wireless network.  Please
refer to the library’s Internet Use Policy.

STEP 1:  Set up DHCP
* If you know that your computer is setup to automatically obtain an IP address, you
may skip to step 2.

1. Select Start –> Control Panel–> Network Connections (depending on the
view set up, this might also be labeled Network and Internet Connections.
2. Right click Wireless Network Connection and then click Properties.
3.  In the General information tab, make sure that Internet Protocol (TCP/IP) is
checked and highlighted, then click Properties.
4. On this screen, make sure that the “Obtain an IP address automatically”
radio button is selected. The “Obtain DNS server address automatically”
should also be selected .
5. Click “OK” on all the opened windows to close them.
6. Restart your computer if prompted.

Your computer is now configured for DHCP.

NOTE: If you have an Internet service that you often connect to that uses DHCP you
will not have to set up this service, but your laptop may have retained that IP
address in its files. To get a new IP address through DHCP you will need to
release and renew the IP address.

To Release and Renew IP Addresses:
1. Go to a command prompt. In order to get a command prompt, click start and
choose run. In the “open:” line, type “cmd”. A black box will open with a
command prompt inside it.
2. At the command prompt, type: Ipconfig /release – You should get a notice
that the address has been released.
3. Now you need to get a number from the library network. At the command
prompt, type: Ipconfig /renew – After a brief time, you should be notified that
you have a new IP address associated with your NIC card.  Once you have
received a library IP address, proceed to the browser configuration

* You must have administrative rights to your computer in order to release or
renew your IP address.

STEP 2:  Setup wireless client
* If you client auto detects the library wireless network, you may skip to step 3.

Library should provide settings for connecting wireless clients to the access points.

STEP 3:  Setup browser proxy settings in Internet Explorer

1. Open Internet Explorer
2. On the IE menu bar, click Tools, then Internet Options
3. Under the Internet Option dialog box, click the Connections tab and then the
LAN Settings button.
4. In the LAN Settings dialog box “No settings should be checked”.
5. Click OK twice.
6. A print screen of the final result has been provided below.

NOTE: If you have installed a Personal Firewall System (PFS) you need to be sure
that your PFS is not blocking Internet Access. You may need to authorize access
while you are using the connection.  Please refer to your vendor’s documentation for
instructions on how to do this.

Wifi coverage on Faculty of Computing

Posted by on Mar 15, 2013 in Information, Knowledge base, wifi | Comments Off on Wifi coverage on Faculty of Computing


All student and staff can access wi-fi whole  level in N28 and at new building  Faculty of Computing N28a. This services is for  free and please use it for research and not for personal.