Tip & How-To about Computers & Internet

Undrstanding Wi-fi

There are a few wi-fi 802.11 protocols the most commercially used in Europe and the US are 802.11/a/b/g/n there are also 802.11 i/x/ protocols.There are other protocls in development and ones that have never been commercialised.
Korea uses a different protocol and there are between 11 and 14 channels used depending on which country you are in.
channels 1)--2.412hz
6)-- 2.437hz
11)-- 2.462hz
Are full channels with a bandwidth of 22mhz the rest overlap
Bluetooth protocols are similar but different and can cause conflict.
The wi-fi protocols have in the past few years become popular but there will still in future be more most probably and they will have to be "backwards compatable"--Their popularity is driven by the consumer and it still might be the case that "bluetooth becomes "obsolete"
The signal is sent out in "frames" which is a constant process relative to the code instructions,it can be known that the "Frames" can be dropped due to its not perfect technology however it is at the moment a good system although it can suffer from inteference from other consumer equipment(microwave ovens )for example.

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HI...CANT CONNECT MY IPAQ HX4700 WITH INTERNET(WIRELESLY)I CAN SEE MY NETWORK ON SCREEN,BUT DONT WANNA ACCEPT NETWORK KEY.IAM SHURE THE KEY IS CORECT.RESULT OF WI-FI SELF TEST SAYNG:YOUR WI-FI IS NOT ASSOCIATEDTO AN ACCESS POINT.WI-FI ICON IS AMBER


Are you sure you got the key correct? You sHure have problem getting your spelling coRect. If you are sure, check if you got the encryption protocol (WEP, WPA, WPA2) and sub-protocol settings correct, and check your SSID, key number (1-4), etc.

Jan 17, 2011 | HP iPAQ HX4700 Pocket PC

1 Answer

what is wifi


Hi,
Wireless local area network is a local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet, uses ethernet protocol.

In simple word allow you to surf internet without any internet cable connection, Wi-Fi enabled device such as a personal computer, video game console, smartphone or digital audio player can connect to the Internet when within range of a wireless network connected to the Internet. The coverage of one or more (interconnected) access points called hotspots, can comprise an area as small as a few rooms or as large as many square miles. Coverage in the larger area may depend on a group of access points with overlapping coverage.

In addition to private use in homes and offices, Wi-Fi can provide public access at Wi-Fi hotspots provided either free-of-charge or to subscribers to various commercial services. Organizations and businesses - such as those running airports, hotels and restaurants - often provide free-use hotspots to attract or assist clients. Enthusiasts or authorities who wish to provide services or even to promote business in selected areas sometimes provide free Wi-Fi access.


Thanks....!!!

Nov 06, 2010 | Nokia N81

1 Answer

what is wi fi whats does it do


Hi,

Wi-Fi stands for wireless fidelity. The term Wi-Fi, which is alternatively pushed by the Wi-Fi Alliance, a trade group that pioneered commercialization of the technology. Wi-Fi is mostly about connecting to the Internet without physically attaching your computer to anything. Mostly it's about using laptop computers.


A Wi-Fi enabled device such as a personal computer, video game console, mobile phone, MP3 player or personal digital assistant can connect to the Internet when within range of a wireless network connected to the Internet. The coverage of one or more (interconnected) access points — called a hotspot — can comprise an area as small as a few rooms or as large as many square miles. Coverage in the larger area may depend on a group of access points with overlapping coverage. Wi-Fi technology has been used in wireless mesh networks, for example, in London.

In addition to private use in homes and offices, Wi-Fi can provide public access at Wi-Fi hotspots provided either free-of-charge or to subscribers to various commercial services. Organizations and businesses - such as those running airports, hotels and restaurants - often provide free-use hotspots to attract or assist clients. Enthusiasts or authorities who wish to provide services or even to promote business in selected areas sometimes provide free Wi-Fi access.
Routers that incorporate a digital subscriber line modem or a cable modem and a Wi-Fi access point, often set up in homes and other premises, can provide Internet-access and internetworking to all devices connected (wirelessly or by cable) to them. One can also connect Wi-Fi devices in ad-hoc mode for client-to-client connections without a router. Wi-Fi also enables places that would traditionally not have network access to connect, for example bathrooms, kitchens and garden sheds.

Good luck and have a nice day.
rating the solution is highly appreciated.

Jul 29, 2010 | RIM BlackBerry Curve 8520 Smartphone

1 Answer

I purchased a new IPOD and I can not access the wifi from my Linksys wireless router.. I reset my Linksys router to try to solve this problem. And at first when the light was amber I was able to have internet access on my IPOD but now it is white and I can't get access. Can you help me.


Resolution If you know there is a nearby Wi-Fi network, but you are unable to locate it on the Settings > Wi-Fi screen:
  • Move closer to the Wi-Fi router or hotspot.
  • If you are using a personal Wi-Fi network, verify the Wi-Fi router is connected to power and turned on.
  • Wi-Fi networks configured as "closed" or "private" do not broadcast the network name to Wi-Fi devices.
    • Join a "closed" or "private" network by tapping Settings > Wi-Fi > Other and entering the Wi-Fi network name, security, and password.
After joining a Wi-Fi network, if you notice the signal strength is low or intermittent
  • Move closer to the Wi-Fi router or hotspot.
  • Check for any sources of potential interference.
  • Remove any cases or attachments on your device that could interfere with a Wi-Fi signal.
If you are unable to access the Internet while connected
  • If you are using a commercial Wi-Fi network that requires a special login or subscription, see this article for more information.
  • If you are in a location with multiple Wi-Fi networks, verify that you are selecting the correct network.
  • Verify that the Wi-Fi network settings are correct:
    • Tap Settings > Wi-Fi.
    • Locate the Wi-Fi network you are currently using and tap ts1398_2.jpg
      blank.gif
  • You can configure network-specific settings, including IP address, DNS, and Search Domain settings.
  • Use "Forget this Network" to reset settings for this particular Wi-Fi network, including the password. This is also useful if you identify a network issue and want to prevent the device from automatically using this network in the future.
  • Use "Renew Lease" to acquire new IP address, DNS, and Search Domain information from the Wi-Fi network.
  • Note: If the Wi-Fi network uses MAC address filtering, you will need to add the MAC address to the access list for the Wi-Fi router. The MAC address for your device is listed as the Wi-Fi Address in Settings > General > About.
If you are still unable to join a Wi-Fi network, or are unable to access the Internet while connected, try the following
  • Restart the device
    • Hold the power button until "slide to power off" appears. Slide to power off your device. When it is off, press the power button to turn it back on.
  • Reset network settings by selecting Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings, including passwords, VPN, and APN settings.
  • iPhone only: If you continue to experience issues, consider turning off Wi-Fi and using the cellular data connection instead of Wi-Fi.
Additional Information If using a Wi-Fi router at home, refer to your user manual/documentation to assist you with some of these suggestions.
  • Check the manufacturer's website for your Wi-Fi router for firmware or software updates.
  • Verify the Wi-Fi router can broadcast an 802.11b/g signal. If using a 802.11n Wi-Fi router, consult the manual/documentation for how to configure the Wi-Fi router for 802.11b/g compatibility.
  • If you are using multiple WEP keys on your Wi-Fi router, try configuring your Wi-Fi router to use only a single WEP key.
  • Try or resetting (or turning off and then on again) your Wi-Fi router. Note: If your ISP also provides cable or phone service, check with them before attempting this step to avoid interruption of service.
  • Disable wireless encryption or security on the Wi-Fi router to rule out encryption issues. If this resolves the issue, try using a different encryption or security protocol.

Mar 22, 2010 | Linksys Wireless-G WRT54G Router

2 Answers

what is a wpa key password


WPA is a type of security for a wirelss router to keep people out of the network without the key password. The password is used to log onto the router and allow the computer to communicate with the router and internet. The key is created using the wireless router settings menu and can be found on the same menu. If you do not know the key then you will need to hook the computer directly up to the router and use the router settings menu to find out what the key is.

Oct 06, 2009 | NetGear WGT624 Wireless Router

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