Wireless Access Point

A wireless access point (WAP) gives wireless devices, such as laptops, cameras, PDAs, and printers, access to a network, and choosing your wireless access point is the first step in setting up a wireless network. The building blocks of a wireless LAN are network adapters, access points, wireless routers, add-on wireless antennas and signal boosters. Of these, only network adapters are truly required to build a wireless home network. However, many wireless LANs also utilize some of the other equipment, as explained below.

Each computer you wish to connect to a WLAN must possess a wireless network adapter. Wireless adapters are sometimes also called NICs, short for Network Interface Cards. Wireless adapters for desktop computers are often small PCI cards or sometimes card-like USB adapters. Wireless adapters for notebook computers resemble a thick credit card. Nowadays, though, an increasing number of wireless adapters are not cards but rather small chips embedded inside notebook or handheld computers. Wireless network adapters contain a radio transmitter and receiver (transceiver). Wireless transceivers send and receive messages, translating, formatting, and generally organizing the flow of information between the computer and the network. Determining how many wireless network adapters you need to buy is the first critical step in building your home network. Check the technical specifications of your computers if you're unsure whether they contain built-i.

A wireless access point serves as the central WLAN communication station. In fact, they are sometimes called "base stations." Access points are thin, lightweight boxes with a series of LED lights on the face (see Page 1 sidebar for illustration).

Access points join a wireless LAN to a pre-existing wired Ethernet network. Home networkers typically install an access point when they already own a broadband router and want to add wireless computers to their current setup. You must use either an access point or a wireless router (described below) to implement "hybrid" wired/wireless home networking. Otherwise, you probably don't need an access point.

A wireless router is a wireless access point with several other useful functions added. Like wired broadband routers, wireless routers also support Internet connection sharing and include firewall technology for improved network security. Wireless routers closely resemble access points (see Page 1 sidebar for illustration). Wireless network adapters, access points, and routers all utilize an antenna to assist in receiving signals on the WLAN. Some wireless antennas, like those on adapters, are internal to the unit. Other antennas, like those on many access points, are externally visible. The normal antennas shipped with wireless products provide sufficient reception in most cases, but you can also usually install an optional, add-on antenna to improve reception. You generally won't know whether you'll need this piece of equipment until after you finish your basic network setup.

To maximize benefit from the directions below, have your answers ready for the following questions:

Do you want to extend your wired home network with a WLAN, or are you building a completely new network?
How many wireless computers do you plan to network, and where in the home will be they be located?
What operating systems do/will you run on your networked computers?
Do you need to share your Internet connection among the wireless computers? How else will you use this WLAN? File sharing? Network gaming?

One wireless router supports one WLAN. Use a wireless router on your network if:

You are building your first home network, or
You want to re-build your home network to be all-wireless, or
You want to keep your WLAN installation as simple as possible

Try to install your wireless router in a central location within the home. The way Wifi networking works, computers closer to the router (generally in the same room or in "line of sight") realize better network speed than computers further away.

Connect the wireless router to a power outlet and optionally to a source of Internet connectivity. All wireless routers support broadband modems, and some support phone line connections to dial-up Internet service. If you need dial-up support, be sure to purchase a router having an RS-232 serial port. Finally, because wireless routers contain a built-in access point, you're also free to connect a wired router, switch, or hub.

Next, choose your network name. In Wi-Fi networking, the network name is often called the SSID. Your router and all computers on the WLAN must share the same SSID. Although your router shipped with a default name set by the manufacturer, it's best to change it for security reasons. Consult product documentation to find the network name for your particular wireless router, and follow this general advice for setting your SSID.

Last, follow the router documentation to enable WEP security, turn on firewall features, and set any other recommended parameters. To read the second part of the article, click here.