會員 | 引用:
因為之前有人提如下文章,我有興趣才提出相關問題,如果偏離主題 尚請見諒! quote: -------------------------------------------------------------------------------- 最初由 lionel_lo 插個話~~~ 我學校暑假要裝6個無線網路的基地台 據可靠消息指出 開學後只要有無線往卡就可以在學要任何地方上網 真是期待.... -------------------------------------------------------------------------------- 請問上述功能之設備要花費多少錢ㄚ? 有人知道嗎? | |
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會員 | 這個網站有測試資料NEW 引用:
http://www.big5.tomshardware.com/con...825/index.html | |
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會員 | Re: 這個網站有測試資料NEW 引用:
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苦力一枚 | 台灣好像有一家公司提供無線網路的服務了 http://www.hirun.com.tw 原理應該是一樣的,不過上面沒有寫規格,我想通訊協定應該也是完全一樣的,應該設備也是一樣的,是社區由一個gateway連接該公司,大部分都只在大廈推出,應該是因為設備必須架在最高處吧! |
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會員 | 如果沒有分享器想用無線上網方式, 可試著使用 無線路由器, 可同時當AP和Server ,使用網路芳鄰就和平常一樣, 如已有分享器,那就只能再買一台AP了... 我在辦公室用過無線路由器超過70M, 但它本身就附了二根增益天線, 售價在一萬以內.. 機型:Vigor2200We 還有一點, 無線卡本身有分2.0 或 2.5代的差別, 後者會比前者來的好,因此這也是價差之一吧. |
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會員 | 引用:
使用WLAN傳送具有機密性、或是敏感的資料時,就會有更多的安全性。 至於另一個安全性的建議則是802.1x講到的東西了,利用RADIUS Server的方式,以 Dynamic key的方式來作認證的動作,因此便能夠得到更高的安全性 | |
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會員 | 引用:
,除去免費上網的中正機場不談,都是透過這樣的架構在運行的,因為牽涉到 費用的問題嘛呵呵! 不過像校園的無線上網,還是有透過鎖無線網卡的MAC address的(號稱國內目前wlan涵蓋範圍最大的中山大學) 畢竟WLAN的安全問題,應該還是最讓人質疑的吧 | |
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會員 | 引用:
-------------------------------------------------------------------------------- PRISM® 2 WLAN Chip Set provides a complete solution from antenna- to-computer?bus for 11Mbps WLAN systems. Intersil components used on the PRISM 2 builders kit: ? HFA3983 - 2.4GHz Power Amplifier with Detector ? HFA3683A - 2.4GHz RF/IF Converter and Synthesizer (RF/IF) ? HFA3783 - I/Q Mod/DeMod and Synthesizer (IF) ? HFA3861B - Baseband Processor with Rake Receiver (BBP) ? HFA3863 - Baseband Processor with Rake Receiver and Equalizer (Pin Compatible with HFA3861B) ? HFA3842 - Medium Access Controller (MAC) -------------------------------------------------------------------------------- PRISM 2.5, demonstrates the continuing progress Intersil is making toward more highly integrated, feature-rich WLAN silicon high performance solutions for future adapters smaller than present PCMCIA cards. Wireless LAN adapters in smaller forms (CompactFlash, MiniPCI, CardBus or embedded modules) are necessary for wide deployment of wireless connectivity in small devices such as laptops, palmtops, PDAs, and digital cameras, to name just a few. PRISM 2.5 makes a major step by integrating the Baseband Processor (BBP) and Medium Access Controller (MAC) - digital functions done by separate ICs in the PRISM II set. The PRISM 2.5 set also includes die shrinks of the power amplifier and RF/IF converter in much smaller form factors (micro-lead frame packages). PCMCIA and USB: ? ISL3984 - 2.4GHz Power Amplifier and Detector ? ISL3685 - 2.4GHz RF/IF Converter and Synthesizer ? HFA3783 - I/Q Modulator/Demodulator Synthesizer ?ISL3873B - Integrated MAC and Baseband Processor for PCMCIA and USB ?ISL3183 - IF VCO MiniPCI: ? ISL3984 - 2.4GHz Power Amplifier and Detector ? ISL3685 - 2.4GHz RF/IF Converter and Synthesizer ? HFA3783 - I/Q Modulator/Demodulator Synthesizer ?ISL3874A - Integrated MAC and Baseband Processor for MiniPCI ?ISL3183 - IF VCO --------------------------------------------------------------------------------PRISM® 3 provides an IEEE 802.11b based wireless LAN platform optimized for consumer applications. The innovative Direct Down Conversion (Zero-IF) architecture significantly reduces WLAN product cost. Decreasing the WLAN components to a two-chip design, Intersil enables partners to create products in smaller form factors for existing and emerging markets. OEM developers can target consumer market applications using the embedded PCMCIA, Compact Flash and USB interface. The world-class PRISM 3 front-end ISL3684 chip utilizes Direct Down Conversion technology, eliminating the need for intermediate-frequency mixer(s), amplifier and filter components. The ISL3871 is a highly integrated Baseband/MAC which is matched to the ISL3684 front end. The result is a significant reduction in component count, enabling new WLAN products for emerging consumer markets. The PRISM 3 development kit will support popular design interfaces including PCMCIA and USB. This reference design can be Wi-Fi™ certified by the Wireless Ethernet Compatibility Alliance (WECA), thus ensuring multi-vendor interoperability. Intersil components used on the PRISM 3 builders kit: WLAN Chips ISL3684 - Direct Up/Down Converter - Single chip PHY-ZIF ISL3871- Integrated Baseband/MAC Power & VCO ISL3084 - VCO - 5GHz ISL3984 - Power Amplifier | |
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