802 11G Adapter
April 16, 2010admin Comments Off
802 11G Adapter
54M Wireless 802.11g PCI Network LAN Card Adapter
Easy ways to setup wi-fi at home
Simple way to setup a wifi connection in home.
Introduction About Wifi.
If you've been in an airport, coffee shop, library or hotel recently, chances are you've been right in the middle of a wireless network. Many people also use wireless networking, also called WiFi or 802.11 networking, to connect their computers at home, and some cities are trying to use the technology to provide free or low-cost Internet access to residents. In the near future, wireless networking may become so widespread that you can access the Internet just about anywhere at any time, without using wires.
WiFi has a lot of advantages. Wireless networks are easy to set up and inexpensive. They're also unobtrusive -- unless you're on the lookout for a place to use your laptop, you may not even notice when you're in a hotspot. In this article, we'll look at the technology that allows information to travel over the air. We'll also review what it takes to create a wireless network in your home.
What is wifi?
A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication. Here's what happens: A computer's wireless adapter translates data into a radio signal and transmits it using an antenna.
A wireless router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernet connection. 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. The radios used for WiFi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and convert the radio waves back into 1s and 0s. But WiFi radios have a few notable differences from other radios:
They transmit at frequencies of 2.4 GHz or 5 GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data.
They use 802.11 networking standards, which come in several flavors: 802.11a transmits at 5 GHz and can move up to 54 megabits of data per second. It also uses orthogonal frequency-division multiplexing a more efficient coding technique that splits that radio signal into several sub-signals before they reach a receiver. This greatly reduces interference.
802.11b is the slowest and least expensive standard. For a while, its cost made it popular, but now it's becoming less common as faster standards become less expensive. 802.11b transmits in the 2.4 GHz frequency band of the radio spectrum. It can handle up to 11 megabits of data per second, and it uses complementary code keying (CCK) modulation to improve speeds.
802.11g transmits at 2.4 GHz like 802.11b, but it's a lot faster -- it can handle up to 54 megabits of data per second. 802.11g is faster because it uses the same OFDM coding as 802.11a.
802.11n is the newest standard that is widely available. This standard significantly improves speed and range. For instance, although 802.11g theoretically moves 54 megabits of data per second, it only achieves real-world speeds of about 24 megabits of data per second because of network congestion. 802.11n, however, reportedly can achieve speeds as high as 140 megabits per second. The standard is currently in draft form -- the Institute of Electrical and Electronics Engineers (IEEE) plans to formally ratify 802.11n by the end of 2009.
Other 802.11 standards focus on specific applications of wireless networks, like wide area networks (WANs) inside vehicles or technology that lets you move from one wireless network to another seamlessly.WiFi radios can transmit on any of three frequency bands. Or, they can "frequency hop" rapidly between the different bands. Frequency hopping helps reduce interference and lets multiple devices use the same wireless connection simultaneously.
Building a Wireless Network
How much you know about WiFi and what it does? Test your knowledge with our WiFi Quiz!If you already have several computers networked in your home, you can create a wireless network with a wireless access point. If you have several computers that are not networked, or if you want to replace your Ethernet network, you'll need a wireless router. This is a single unit that contains:
A port to connect to your cable or DSL modem
A router
An Ethernet hub
A firewall
A wireless access point
A wireless router allows you to use wireless signals or Ethernet cables to connect your computers to one another, to a printer and to the Internet. Most routers provide coverage for about 100 feet(30.5 meters) in all directions, although walls and doors can block the signal. If your home is very large, you can buy inexpensive range extenders or repeaters to increase your router's range As with wireless adapters, many routers can use more than one 802.11 standard. 802.11b routers are slightly less expensive, but because the standard is older, they're slower than 802.11a, 802.11g and 802.11n routers. Most people select the 802.11g option for its speed and reliability.Once you plug in your router, it should start working at its default settings. Most routers let you use a Web interface to change your settings. You can select:
The name of the network, known as its service set identifier (SSID) -- The default setting is usually the manufacturer's name. The channel that the router uses -- Most routers use channel 6 by default. If you live in an apartment and your neighbors are also using channel 6, you may experience interference. Switching to a different channel should eliminate the problem. Your router's security options -- Many routers use a standard, publicly available sign-on, so it's a good idea to set your own username and password.
Security is an important part of a home wireless network, as well as public WiFi hotspots. If you set your router to create an open hotspot, anyone who has a wireless card will be able to use your signal. Most people would rather keep strangers out of their network, though. Doing so requires you to take a few security precautions.It's also important to make sure your security precautions are current. The Wired Equivalency Privacy (WEP) security measure was once the standard for WAN security. The idea behind WEP was to create a wireless security platform that would make any wireless network as secure as a traditional wired network. But hackers discovered vulnerabilities in the WEP approach, and today it's easy to find applications and programs that can compromise a WAN running WEP security.
To keep your network private, you can use one of the following methods:
WiFi Protected Access (WPA) is a step up from WEP and is now part of the 802.11i wireless network security protocol. It uses temporal key integrity protocol (TKIP) encryption. As with WEP, WPA security involves signing on with a password. Most public hotspots are either open or use WPA or 128-bit WEP technology, though some still use the vulnerable WEP approach.
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.
Wireless networks are easy and inexpensive to set up, and most routers' Web interfaces are virtually self-explanatory. For more information on setting up and using a wireless network
 802.11g USB WiFi Wireless Lan Adapter w/5dBi Antenna Sale Price: $12.99  Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionSpecifications :Data Rate:IEEE 802.11b: 1, 2, 5.5, 11Mbps IEEE 802.11g: 6, 9, 12, 18, 24, 36, 48, 54Mbps PSP X-link support Software AP mode support Security: WEP (64/128/256bit), WPA, WPA-PSK, WPA2, WPA2-PSK Supporting O.S.:Windows 98SE / ME / 2000 / XP / Vista Mac v10.3 and v10.4 and 10.5 Linux Kernel v2.6.6 and later Features
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 150Mbps WIFI USB WIRELESS LAN ADAPTER 802.11 B/G/N Sale Price: $7.05 Eligible for free shipping!Availability: Usually ships in 1-2 business days See Reviews For This Product DescriptionFor the driver, please install from the CD disk,if it cannot work, please go to http://www.ralinktech.com/support.php?s=1.Choose the correct Chipset RT3072/RT307X |
 Cisco-Linksys WPC54G Wireless-G Notebook Adapter List Price: Sale Price: $7.89 You save: $50.10 (86%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionWireless-G is the upcoming 54Mbps wireless networking standard thats almost five times faster than the widely deployed Wireless-B (802.11b) products found in homes, businesses, and public wireless hotspots around the country but since they share the same 2.4GHz radio band, Wireless-G devices can also work with existing 11Mbps Wireless-B equipment.The new Wireless-G Notebook Adapter from Linksys has both standards built in, so you can connect your notebook to existing 802.11b infrastructure, and also the new screaming fast Wireless-G networks. The included Setup Wizard will walk you through configuring the adapter to your networks settings, step by step. Then just slide it into your notebooks PC Card slot and enjoy network access with your notebook computer, while retaining true mobility.Once youre connected, you can keep in touch with your e-mail, access the Internet, and share files and other resources such as printers and network storage with other computers on the network, wherever you wander. Amazon.com Product Description Early Adopters Pick, January 2003. The first high-speed wireless networking PC card for laptops to use the 802.11g standard, which is four times faster than the current standard (802.11b) and backwards compatible. The new Wireless-G notebook adapter (PC Card adapter) from Linksys has both the 802.11b and newer 802.11g standards built in, so you can connect your notebook to existing 802.11b infrastructure and also the new, fast Wireless-G networks. The included setup wizard walks you through configuring the adapter to your network's settings, step by step. Then just slide the adapter into your notebook's PC Card slot and enjoy network access with your notebook computer, while retaining true mobility. Wireless-G is the 54 Mbps wireless networking standard that's almost five times faster than the widely deployed Wireless-B (802.11b) products that are found in homes, businesses, and public wireless hotspots around the country. But since they share the same 2.4 GHz radio band, Wireless-G devices also work with existing 11 Mbps Wireless-B equipment. Once you're connected, you can keep in touch with your e-mail, access the Internet, and share files and other resources such as printers and network storage with other computers on the network, wherever you wander. At home, you can surf the Web or use instant messaging to chat with friends while sitting out on the patio. You'll also be able to connect to any of the growing number of public wireless hotspots springing up in coffee shops, airport lounges, hotels, and convention centers. And as those hotspots upgrade to the new high-speed Wireless-G standard, you'll be ready to take advantage of the increased speeds. Get connected to current standard 802.11b networks today, and be prepared for the future with the Wireless-G notebook adapter from Linksys. See a comparison diagram of the different wireless technologies. Wireless networks are rapidly becoming more popular and coming down in price. Since they don't require cables, you can use the devices anywhere in an office or home, even out on the patio. There's no need to roll out an Ethernet network cable to each room of a house; you can network anywhere--without wires. Outside the home, wireless networking is available in hotspots at coffee shops, businesses, and airports--great when you're on the road and need to get some work done. For convenience, wireless networking is the answer. Which Wireless Standard Is Right for Me? Now that you've decided to create a wireless network, the next step is to figure out which wireless standard to use. Basically, a standard is a set of specifications for a device. All devices that follow a specific standard share operating characteristics, such as the radio frequency used and maximum data transfer speed. For wireless networking, there are three standards to choose from at this time: 802.11b 802.11a 802.11g To learn about the differences between the standards and select the right one for your network, click here for an easy-to-understand chart. Features
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 Medialink - Wireless G USB Adapter - 802.11g - 54Mbps - 2.4ghz - Windows 2000 / XP / Vista 32-Bit / Vista 64-Bit / Windows 7 Compatible List Price: Sale Price: $24.99 You save: $34.96 (58%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionOffering the ultimate in simplified Wi-Fi installation, Medialink's 54Mbps Wireless G USB Adapter works with any manufacturer's 802.11B or 802.11G wi-fi router and offers a simplified one click installation. Insert the CD, click "install software" and the utility will auto-detect your operating system and install the appropriate drivers. Simply plug in your adapter and enjoy the convenience of your wifi network. Surprisingly, many wifi adapters on the market are not Microsoft WHQL certified to ensure trouble-free compatibility with Microsoft's operating systems. To provide our customers with ultimate confidence in our products, all Medialink adapters are Microsoft WHQL certified. In addition, this adapter features internationally recognized standards-based security features including WPA/WPA2, IEEE802.1X as well as 64/128/152-bit WEP for the ultimate in sucurity. MAC filtering is also available. With these enhanced security features, you can feel confident that you have state of the art wifi security options.. This USB adapter includes a Medialink Wireless Client Utility to auto-detect available wireless networks for quick connection. The utility also conveniently allows you to create and save detailed connectivity profiles for different accessed networks. The Medialink Wireless Client Utility also provides a number of tools to display current diagnostics and status information so that you can easily diagnose and resolve connection problems. Offering excellent wireless performance and network security, the Medialink 54Mbps Wireless G USB Adapter is an excellent choice for adding wireless connectivity to your desktop or notebook PC. CD includes drivers for Windows 2000, XP, Vista 32-Bit, Vista 64-Bit. Features
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 Medialink - Wireless N USB Adapter - 802.11n - 150Mbps - 2.4ghz - Windows 2000 / XP / Vista 64-Bit /128-Bit Windows 7 Compatible List Price: Sale Price: $29.99 You save: $60.00 (67%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionMedialink - Wireless N USB Adapter - 802.11n 150Mbps* Compatible with any Brand 802.11g or 802.11n Router Using 2.4ghz Wavelength * Microsoft WHQL Certified * Supports WEP, WPA and WPA2 Security * Live US Based Customer Service Offering the ultimate in simplified Wi-Fi installation, Medialink's 150Mbps Wireless N USB Adapter offers a simplified one click installation. Insert the CD, click "install software" and the utility will auto-detect your operating system and install the appropriate drivers. (Windows 7 Users, just plug and play! No CD required.)Compatibility- Any PC or Laptop with a USB port, 733MHz CPU, and 64MB Memory- Any brand 802.11g or 802.11n router using 2.4ghz wavelength- Windows 2000, 2003, XP Home/Pro/64-Bit, Vista 32-Bit/64-Bit, Windows 7- NOT COMPATIBLE with Xbox 360, PS3, Blu-Ray Players, Roku Boxes, or any device that does not run an Operating System. Also will not work with Dual Band Routers that only broadcast N speeds on 5ghz wavelength. Microsoft WHQL CertifiedUnlike many Wi-Fi adapters, Medialink adapters are Microsoft WHQL certified to ensure compatibility with the major operating systems listed above.SecurityThis adapter provides state of the art standards-based security features: WPA/WPA2, IEEE802.1X, 64/128-bit WEP. With these enhanced security features, you can encrypt your data and only allow authorized users to access your wireless network.Customer ServiceMedialink products are backed by superior customer support. If you need assistance you can call us at 856-216-8222 Tuesday - Saturday 9am to 6pm Eastern or email us after hours at support@medialinkproducts.com. Please have the security type and password ready if you need help troubleshooting your connection. Features
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 Alfa 1000mW 1W 802.11b/g USB Wireless WiFi Network Adapter With Original Alfa Screw-On Swivel 9dBi Rubber Antenna List Price: Sale Price: $37.99 You save: $52.00 (58%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionYou asked for STRONGER WiFi and Extended Range and here it is. We have combined this high power Wi-Fi adapters with a powerful +9 dBi 15'' 2.4GHz Hi-Gain folding antenna. Estimated range is (depending on environment) 1.2 mile (2km) Most common Wi-Fi devices (D-Link, Linksys, and Netgear) have power ratings of less than 50mW (milliwatts.) Our new Wi-Fi device is 10x as strong (1000 mW.) This adapter is what the WiFi world has been waiting for. It is compatible with almost all laptops and desktop, PCs and Macs. This kit also includes two antennas- one mini 5 dBi gain travel antenna, and one high gain 9 dBi antenna, as pictured. It is perfect to travel with and weighing less than 2 ounces and measuring 3.5 x 2.5 inches in size (8.5 x 6.3cm) This has a stunning 1000mw output power. So if you are looking for a device to connect to an outdoor 2.4 GHz antenna, such as on a boat or an RV, this is a perfect solution. Because this is a USB adapter, it works on any computer that has a USB port.this also works with Windows Vista, Linux (kernel 2.6.6 and later) and Macintosh (OS version 10.4). And the drivers for ALL of these operating systems are included on CD-ROM - Wi-Fi Certified - Includes 2 external antennas- a 5 dBi mini antenna, and an 9 dBi antenna as pictured - Diagnostic LED indicator - Complies with 802.11g standard for 2.4Ghz Wireless LAN - Contains RP-SMA external antenna jack (one external antenna is included!) - Enterprise-class 64/128 WEP encryption, WPA, WPA-PSK, WPA2, 802.1X support - 54 mbps High-Speed Transfer Rate for 802.11g - High powered adapter- 1000mw output power - USB 2.0 and 1.1 compliant Features
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 BELKIN F5D7050 Wireless 802.11g USB Network Adapter List Price: Sale Price: $20.10 You save: $28.51 (59%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionThe Wireless G USB Network Adapter easily connects your USB-equipped desktop or notebook computer to your wireless network for Internet and file sharing. Desktop users can now join the network with the ease of a USB plug-in, without opening their PC cases laptop users can enjoy the benefits of staying mobile-while connected to the Internet. Features
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 ASUS PCI-G31 - Wireless PCI Adapter - 802.11b/g List Price: Sale Price: $16.88 You save: $3.11 (16%) Eligible for free shipping!Availability: Usually ships in 1-2 business days See Reviews For This Product DescriptionASUS PCI-G31 - 54Mbps 802.11b/g Wireless PCI Adapter- WPS(Wi-Fi Protected Setup) - Quickly set up a secure wireless connection - Software AP - Connects your notebook, PSP, or other game console to the Internet - Supports WEP, WPA, and WPA2 methods for enhanced security Features
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 Alfa 500mW AWUS036H USB Wireless Adapter 802.11 b/g Network Radio Card. Includes 2dBi Omni Antenna List Price: Sale Price: $31.95 You save: $8.04 (20%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionThe Microcom Technologies AWUS036H USB Adapter provides users to launch IEEE 802.11g wireless network at 54 Mbps in the 2.4GHz frequency, which is also compatible with IEEE 802.11b wireless devices at 11Mbps. You can configure the Microcom Technologies AWUS036H USB Adapter with ad-hoc mode to connect to other 2.4GHz wireless computers or with Infrastructure mode to connect to a wireless AP or router for accessing to Internet. The Microcom Technologies AWUS036H USB Adapter includes a convenient Utility for scanning available networks and saving preferred networks that users usually connected with. Security encryption can also be configured by this utility. Features
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 ASUS USB-N10 - Wireless USB Adapter - 802.11b/g/n List Price: Sale Price: Too low to display Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionASUS USB-N10 - EZ N Network Adapter - Strong and convenient USB connection for fast downloads, rapid file transfers, and low-latency media streaming. PSP Xlink Kai Support: Play system games with PSP users worldwide via the internet. EZ WPS: Improve Wi-Fi security with easy WPS Wizard. Support the newest Window 7 and Mac 10.6 Operating Systems. Features
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