<b>WECA and Wi-Fi</b>
The Wireless Ethernet Compatibility Alliance (WECA) has gone in a completely different direction from HomeRF. Targeted more at office use than home networks, Wi-Fi (for "wireless fidelity", like Hi-Fi for "high fidelity" in audio equipment) is essentially a seal of approval that says the manufacturer's product is compliant with a variation of the IEEE 802.11 specification known as IEEE 802.11b. This specification drops FHSS and focuses on DSSS because of the higher data rate it can attain. Under 802.11b, devices communicate at a speed of 11 Mbps whenever possible. If signal strength or interference is disrupting data, the devices will drop back to 5.5 Mbps, then 2 Mbps and finally down to 1 Mbps. Though it may occasionally slow down, this keeps the network stable and very reliable.
Photo courtesy Nexland
The ISB Wavebase by Nexland allows you to connect wireless devices to your fast Internet connection.
<b>Here are the advantages of Wi-Fi:
It's fast (11 Mbps).
It's reliable.
It has a long range (1,000 ft / 305 m in open areas, 250 to 400 ft / 76 to 122 m in closed areas)
It's easily integrated into existing wired-Ethernet networks.
It's compatible with original 802.11 DSSS devices.
Here are the disadvantages:
It's expensive.
It requires an access point.
It can be difficult to set up.
Speed can fluctuate significantly. </b>
Wi-Fi offers Ethernet speeds without the wires, but you pay for it. Access points vary greatly in cost, from about $300 to $1,400. Most access points have an integrated Ethernet controller to connect to an existing wired-Ethernet network. It also has an omni-directional antenna to receive the data transmitted by the wireless transceivers. Apple sells an inexpensive ($299 list) and easy-to-configure access point called Airport. Airport has to be connected to an Apple computer (iMac, PowerMac, iBook), but it will accept signals from any 802.11b-compatible wireless-network card, whether its PC or Mac-based.
Like HomeRF systems, the majority of Wi-Fi wireless transceivers available are in PCMCIA card form. But some manufacturers do offer PCI or ISA format cards, not just adapters. The cost per card ranges from $99 to more than $300. Because these products are not targeted at the home market, they are not typically sold in "do-it-yourself" kits. Instead, everything is a la carte, allowing customers to build a system that exactly meets their needs.
This is the base unit of a wireless system used to connect workers with laptops.
At the HowStuffWorks offices, we have installed the 3Com Airconnect wireless system with great results. Several of our staff members now freely roam about the workplace with their laptops constantly connected to the network. We invested about $1,400 for the access point and three PCMCIA cards. That's not a bad investment to foster a dynamic work environment, but is certainly on the expensive side for most home networks.
If you are a Mac owner, setting up a Wi-Fi-compatible network is easy, and reasonable in terms of cost. Otherwise, this is an expensive undertaking that requires careful consideration of your needs. In fact, you can buy an inexpensive Apple computer and an Airport access point for close to the amount of money you would invest in most other access points currently available.
<b>There are two other networking technologies that we will discuss: phone-line and power-line networks. Click on the title to go to one of these articles for more information, or proceed to A Word About Macs or The Future of Home Networking</b>
<i>if <b>you know</b> <font color=white>you don't know<font color=black>, the way could be more easy ...