物聯(lián)網(wǎng)概論總復(fù)習(xí)-資料下載頁(yè)
2025-05-13 07:42本頁(yè)面
【正文】 關(guān)系數(shù)據(jù)庫(kù)系統(tǒng)的缺點(diǎn) ?缺乏對(duì)真實(shí)世界實(shí)體的有效表達(dá) ?缺乏對(duì)復(fù)雜查詢的有效處理 ?缺乏對(duì) WEB應(yīng)用的有效支持 (允許延遲、高效存儲(chǔ)查詢、并發(fā)存?。? Page 38 IPv6地址分類 ? 單播地址（ Unicast Address） ? 組播地址（ Multicast Address） ? 任播地址（ Anycast Address） ? 特殊地址 地址類型 二進(jìn)制前綴 IPv6標(biāo)識(shí) 未指定 00...0 (128 bits) ::/128 環(huán)回地址 00...1 (128 bits) ::1/128 組播 11111111 FF00::/8 鏈路本地地址 1111111010 FE80::/10 站點(diǎn)本地地址 1111111011 FEC0::/10 全局單播 （其他） 2021::/3 Global Unicast Addresses ? equivalent to public IPv4 addresses ? Fixed portion set to 001 – The three highorder bits are set to 001. The address prefix for currently assigned global addresses is 2021::/3. ? Global Routing Prefix – Indicates the global routing prefix for a specific anization39。s site. ? Sub ID – The Sub ID is used within an anization39。s site to identify subs. ? Interface ID – Indicates the interface on a specific sub within the site. ? The threelevel structure of the global unicast address： Page 39 Page 40 ? SolicitedNode組播地址生成過(guò)程 – IP地址的后 24位： XX:XXXX – 前綴 FF02:0:0:0:0:1:FF – FF02:0:0:0:0:1:FFXX:XXXX Page 41 Address Resolution Example ? Based on Host B’s IP address, Host A sends a solicitednode multicast Neighbor Solicitation to the address of FF02::1:FF22:2222 Page 42 ? Host B, having registered the solicitednode multicast address of 3333FF222222 with its Ether adapter, receives and processes the Neighbor Solicitation. Host B responds with a unicast Neighbor Advertisement message, Page 43 ? 從物聯(lián)網(wǎng)的定義、體系結(jié)構(gòu)， RFID、 WSN、定位、隱私，移動(dòng)、應(yīng)用領(lǐng)域等方面對(duì)物聯(lián)網(wǎng)進(jìn)行討論。要求字?jǐn)?shù)在 500字左右。
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