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Most enterprises today are experiencing rapid growth in the use of wireless communications. This growth is being fueled by the expansion in the population of mobile workers and by the simple convenience of being able to carry laptops around inside offices without being tethered to Ethernet cables. In fact, most knowledge workers use wireless communications in two or even three contexts: "Roaming" outside the office, through hotels, airports, coffee shops, and customer offices, connecting to corporate networks through WiFi hot spots and mobile data networks. "Untethered computing" - moving within office buildings and corporate campuses, using secure Wireless Local Area Networks (WLANs). Working at home using inexpensive wireless routers.
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