Appendix B

Wireless Networking Basics

This chapter provides an overview of Wireless networking.

Wireless Networking Overview

The WPN511 Wireless PC Card conforms to the Institute of Electrical and Electronics Engineers (IEEE) 802.11b standard for wireless LANs (WLANs) and a product update will bring the WPN511 into conformance to the 802.11g standard when it is ratified. On an 802.11b or g wireless link, data is encoded using direct-sequence spread-spectrum (DSSS) technology and is transmitted in the unlicensed radio spectrum at 2.5GHz. The maximum data rate for the wireless link is 11 Mbps, but it will automatically back down from 11 Mbps to 5.5, 2, and 1 Mbps when the radio signal is weak or when interference is detected. The 802.11g auto rate sensing rates are 1, 2, 5.5, 6, 9, 12, 18, 24, 36, 48, and 54 Mbps.

The 802.11 standard is also called Wireless Ethernet or Wi-Fi by the Wireless Ethernet Compatibility Alliance (WECA, see http://www.wi-fi.net), an industry standard group promoting interoperability among 802.11 devices. The 802.11 standard offers two methods for configuring a wireless network - ad hoc and infrastructure.

Infrastructure Mode

With a wireless Access Point, you can operate the wireless LAN in the infrastructure mode. This mode provides wireless connectivity to multiple wireless network devices within a fixed range or area of coverage, interacting with wireless nodes via an antenna.

In the infrastructure mode, the wireless access point converts airwave data into wired Ethernet data, acting as a bridge between the wired LAN and wireless clients. Connecting multiple Access Points via a wired Ethernet backbone can further extend the wireless network coverage. As a mobile computing device moves out of the range of one access point, it moves into the range of another. As a result, wireless clients can freely roam from one Access Point domain to another and still maintain seamless network connection.

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NETGEAR WPN511 user manual Appendix B Wireless Networking Basics, Wireless Networking Overview, Infrastructure Mode
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WPN511 specifications

The NETGEAR WPN511 is a popular wireless network card specifically designed for laptops and other portable devices, allowing users to connect to wireless networks with ease. With its IEEE 802.11g wireless standard, the WPN511 provides a high-speed connection of up to 54 Mbps, making it suitable for tasks like streaming, file sharing, and online gaming.

One of the key features of the WPN511 is its compatibility with both 802.11g and the older 802.11b standards. This backward compatibility ensures that users can connect to nearly any wireless network, providing flexibility and convenience. The device also employs advanced wireless security features, including WEP, WPA, and WPA2 encryption, which help protect users from unauthorized access and ensure data privacy.

The WPN511 is designed with a compact form factor, making it easy to install and use in various laptop models. It uses a PC Card interface, which allows for simple plug-and-play functionality. Upon inserting the card, users can quickly access an intuitive setup wizard that guides them through the configuration process.

In terms of performance, the NETGEAR WPN511 is equipped with MIMO (Multiple In, Multiple Out) technology, which enhances signal range and reduces dead spots in wireless connectivity. This feature is particularly beneficial in larger environments where a reliable wireless connection is essential. The card is engineered to minimize interference and maintain a stable connection, which is crucial for users engaged in activities requiring consistent bandwidth.

Moreover, the WPN511 supports Quality of Service (QoS) features, which prioritize network traffic to ensure that critical applications like video conferencing and online gaming receive the bandwidth they need without lag or interruption.

Overall, the NETGEAR WPN511 is a robust wireless network card that combines compatibility, security, and performance. Whether professionals need to stay connected during travel or home users want a seamless internet experience, the WPN511 offers a solid solution to meet modern wireless networking demands. Its user-friendly installation process and reliable performance have established it as a go-to choice for many laptop users seeking efficient wireless connectivity.
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