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物聯(lián)網(wǎng)概論總復習-資料下載頁

2025-05-13 07:42本頁面
  

【正文】 關系數(shù)據(jù)庫系統(tǒng)的缺點 ?缺乏對真實世界實體的有效表達 ?缺乏對復雜查詢的有效處理 ?缺乏對 WEB應用的有效支持 (允許延遲、高效存儲查詢、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 二進制前綴 IPv6標識 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、體系結構, RFID、 WSN、定位、隱私,移動、應用領域等方面對物聯(lián)網(wǎng)進行討論。要求字數(shù)在 500字左右。
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