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If the antenna is positioned less than 2 inches (5 cm) from the user, it is recommended that the user limit exposure time. 1-58 Introduction to Wireless LANs Copyright 2001, Cisco Systems, Inc. 11b is considered to be an end-of-the-line technology. Upgrading to 5-GHz technology will be much like converting from an Ethernet network to FDDI. Existing access points may have upgradable radios (removable PC Cards), but chances are that the network interface to the wired LAN won't be able to handle the 54-Mbps data rate.
1X, EAP, WECA) Copyright 2001, Cisco Systems, Inc. Wireless LANs 1-45 Figure 3: Horizontal Applications • Extend wired networks providing mobility • Eliminate expensive wiring problems • Provide a complete networking solution for small companies/SOHO • Integrate home, travel, and work environments for flexible, consistent connectivity • Circumvent physical restrictions that limit network expansion • Provide flexible LAN solutions in fast-changing environments The four main requirements for a WLAN solution are availability, scalability, manageability, and that it must be an open architecture.
0 microseconds. The accepted IEEE transient (surge) suppression is 8 microseconds. Link to: Wireless Demo Wireless Building-to-Building LANs Cisco Product overview (scene 6) Copyright 2001, Cisco Systems, Inc. ” Through the 1990s, each year saw another step in laying the groundwork for the acceptance of wireless technology. Historically, wireless LANs and WANs were seen as separate, discrete solutions designed to solve specific problems. Immature technology, security concerns, and slow connectivity speeds kept wireless LAN technology from becoming a viable alternative to wired LANs.