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Tổng cộng có ba điểm truy cập có thể được đặt trước khi can thiệp sẽ trở thành một vấn đề. D. IEEE 802.11n draft 2.0 sửa đổi các thiết bị sử dụng MIMO, dây chuyền phát thanh nhiều, và ăng-ten để hoạt động. Các thiết bị 802.11a/b/g sử dụng một đài phát thanh và có thể sử dụng nhiều anten đa dạng. | Gathering Business Requirements 257 The Xirrus Wi-Fi Array integrates up to 24 802.11abg n radios coupled with a high-gain directional antenna system into a single device along with an onboard multi-gigabit switch Wi-Fi controller firewall dedicated Wi-Fi threat sensor and an embedded spectrum analyzer. Provides more than enough bandwidth security and control to replace switched Ethernet to the desktop as the primary network connection and results in 75 fewer devices power cabling switch ports and installation time than a traditional thin AP architecture. Result Using an array architecture with directional antennas eliminated the need for an additional 18 access points cable runs and switch ports. It also saved Cellynne Corporation STEFCO Industries over 8600 kWh of energy each year. Reliable Wi-Fi platform for critical business applications Flexible Wi-Fi infrastructure as performance needs increase Secure Wi-Fi connection to protect against internal external threats Read the complete Cellynne Corporation STEFCO Industries case study online by clicking the hyperlink on the CD included with this book. Retail Point of Sale POS Retail and point of sale deployments may have some characteristics similar to those of the warehousing environment. In addition to a large quantity of products such as paper and liquids there may be RF interference sources in businesses that sell appliances and electronics. The use or demonstration of items such as microwave ovens two-way radios consumer grade IEEE 802.11 access points and computers may cause interference issues that need to be evaluated. Security is another major concern for this type of business in order to protect information such as credit card numbers and personal identification numbers PINs . Health Care Medical Health care deployments such as hospitals can be a challenging installation for many reasons. These environments will have both WLAN and non-WLAN devices that operate in the 2.4 GHz ISM band therefore .
