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【正文】 re than you think! ? Site surveys amp。 frequency sweeps needed. ? WEP is not secure。 use SSH, SSL, etc. ? Technology still evolving ? phones interfere badly University of Washington Computing amp。 Communications Wired vs. Wireless Issues ? Server suitability ? Performance ? Performance variation ? Price/Performance ? Interference ? Technology maturity ? Advanced services ? Security University of Washington Computing amp。 Communications : Successor? ? Faster ? Shorter distance ? More power consumption ? Probably won’t replace ? Probably need WAPs for both University of Washington Computing amp。 Communications Infrastructure Requirements P ho nes W i re d W i re les sClo s et s YE S YE S YE SCo nd ui t YE S YE S YE SW i re pl a nt YE S YE S M u c hSw it ches M ay b e YE S So m eW AP s NO NO YE SUniversity of Washington Computing amp。 Communications Conclusions ? Wireless is very addictive. ? It will be very popular. ? It will be very problematic. ? The dust has not settled. ? In offices, it is not a replacement for wired. ? In classrooms, lounges, etc, it is… but that still requires some wired infrastructure. University of Washington Computing amp。 Communications Wireless References ? Open Group: ? Wireless Ether Compatibility Alliance (WECA) ? Wireless LAN Association (WLANA) ? Portable Computer amp。 Communications Association (PCCA) ? Inter Engineering Task Force (IETF) ? WAP Forum ? Bluetooth Special Interest Group ? Mobile Wireless Inter Forum (MWIF) ? Wireless Information Networks Forum (WINForum) ? HiperLAN2 Global Forum ? Wireless Data Forum
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