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【正文】 /IP協(xié)議 查找地址的過程： TCP/IP協(xié)議 TCP/IP協(xié)議 主機(jī)的 IP地址：包括網(wǎng)絡(luò)標(biāo)識(shí)號(hào)和主機(jī)標(biāo)識(shí)號(hào)兩部分 TCP/IP協(xié)議 A類地址空間 Millions of class A addresses are wasted TCP/IP協(xié)議 B類地址空間 Many class B addresses are wasted C類地址空間 The number of addresses in a class C block is smaller than the needs of most anizations. TCP/IP協(xié)議 TCP/IP協(xié)議 Class E addresses are reserved for special purposes。 most of the block is wasted. Class E addresses are reserved for special purposes。 most of the block is wasted TCP/IP協(xié)議 特殊的 IP地址 Special Address Netid Hostid Source or Destination Network address Specific All 0s None Direct broadcast address Specific All 1s Destination Limited broadcast address All 1s All 1s Destination This host on this work All 0s All 0s Source Specific host on this work All 0s Specific Destination Loopback address 127 Any Destination TCP/IP協(xié)議 Network address TCP/IP協(xié)議 Direct broadcast address TCP/IP協(xié)議 Limited broadcast address TCP/IP協(xié)議 This host on this work TCP/IP協(xié)議 Specific host on this work TCP/IP協(xié)議 Loopback address Private Addresses A number of blocks in each class are assigned for private use. They are not recognized globally. TCP/IP協(xié)議 TCP/IP協(xié)議 Class Netid Total A 1 B To 16 C TO 256 Private Addresses TCP/IP協(xié)議 多地址的主機(jī) A mask is a 32bit binary number that gives the first address in the block (the work address) when bitwise ANDed with an address in the block. TCP/IP協(xié)議 子網(wǎng)掩碼 TCP/IP協(xié)議 工作原理 TCP/IP協(xié)議 The work address is the beginning address of each block. It can be found by applying the default mask to any of the addresses in the block (including itself). It retains the id of the block and sets the hostid to zero TCP/IP協(xié)議 掩碼的作用 Given the address and the class C default mask, find the beginning address (work address). The default mask is , which means that the first 2 bytes are preserved and the other 2 bytes are set to 0s. The work address is . TCP/IP協(xié)議 例如： 謝謝觀看 /歡迎下載 BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH
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