Figure 2-1

Chapter 2: Planning Your Wireless Network

Network Topology

A wireless local area network (WLAN) is exactly like a regular local area net- work (LAN), except that each computer in the WLAN uses a wireless device to connect to the network. Computers in a WLAN share the same frequency chan- nel and SSID, which is an identification name for wireless devices.

Ad-Hoc versus Infrastructure Mode

Unlike wired networks, wireless networks have two different modes in which they may be set up: infrastructure and ad-hoc. An infrastructure configura- tion is a WLAN and wired LAN communicating to each other through an access point. An ad-hoc configuration is wireless-equipped computers com- municating directly with each other. Choosing between these two modes depends on whether or not the wireless network needs to share data or periph- erals with a wired network or not.

If the computers on the wireless network need to be accessed by a wired network or need to share a peripheral, such as a print- er, with the wired network computers, the wireless network should be set up in infrastructure mode. (See Figure 2-1.) The basis of infrastructure mode centers around an access point, which serves

as the main point of communications in a wireless network. Access points transmit data to PCs equipped with wireless network cards, which can roam within a certain radial range of the access point. Multiple access points can be arranged to work in succession to extend the roaming range, and can be set up to communicate with your Ethernet (wired) hardware as well.

If the wireless network is relatively small and needs to share resources only with the other computers on the wireless network, then the ad-hocmode can be used. (See Figure 2-2.) Ad-hoc mode allows computers equipped with wire- less transmitters and receivers to communicate directly with each other, elimi- nating the need for an access point. The drawback of this mode is that, in Ad- Hoc mode, wireless-equipped computers are not able to communicate with computers on a wired network. And, of course, communication between the wireless-equipped computers is limited by the distance and interference direct- ly between them.

Figure 2-2

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Linksys WPC55AG manual Planning Your Wireless Network, Network Topology, Ad-Hoc versus Infrastructure Mode
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WPC55AG specifications

The Linksys WPC55AG is a versatile and robust wireless adapter designed to enhance connectivity for laptops and desktop computers. This device stands out with its combination of dual-band connectivity, supporting both 2.4GHz and 5GHz frequencies, making it an excellent choice for users looking to achieve faster speeds and reduced interference. The capability to operate on two different frequencies allows for flexibility in network environments, catering to the varying needs of users.

One of the main features of the WPC55AG is its support for both 802.11g and 802.11a wireless standards, which means it can connect to a wide range of access points and routers. The device can provide wireless speeds up to 54Mbps on the 802.11g band and even higher when operating on the 802.11a band. This ensures a reliable connection for various applications such as video streaming, online gaming, and large file transfers.

The WPC55AG also incorporates advanced security protocols, including Wired Equivalent Privacy (WEP), Wi-Fi Protected Access (WPA), and WPA2. These security features help to safeguard users' networks from unauthorized access, ensuring a secure browsing experience whether at home or in public environments.

Installation of the Linksys WPC55AG is straightforward, thanks to its user-friendly setup wizard. The card is compatible with a variety of operating systems, including Windows and Mac OS, ensuring that a wide range of users can benefit from its capabilities. With its PCI card form factor, this wireless adapter can easily be installed in most computers, providing a stable connection that surpasses that of many built-in wireless solutions.

In addition to its impressive technical features, the Linksys WPC55AG is notable for its durability and reliability. Designed for long-term use, this adapter boasts a sleek design that complements modern computing setups while maintaining functionality. With ongoing updates and support from Linksys, users can ensure that their devices operate at peak performance.

In conclusion, the Linksys WPC55AG is an excellent choice for individuals looking to enhance their wireless connectivity. Its dual-band capabilities, extensive range of compatible standards, robust security features, and ease of installation make it a go-to option for both casual users and gaming enthusiasts alike. Whether at home or on-the-go, this wireless adapter provides the performance and reliability that users demand.
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