ipv4地址规划-秒子网划分详解.pptVIP

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ipv4地址规划-秒子网划分详解.ppt

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ipv4地址规划-秒子网划分详解

IPv4地址 * globally unique global local 点分十进制 1.1.1.1 0.0.0.0 255.2 八位位组 multicast address DIX DEC COMPAQ INTERNIC IANA ANNIC CNNIC 0XXXXXXXX 10XXXXXXX 110XXXXXX globally unique global local 点分十进制 1.1.1.1 0.0.0.0 255.2 八位位组 globally unique global local 点分十进制 1.1.1.1 0.0.0.0 255.2 八位位组 127.0.0.1 255.255.255.255 0.0.0.0 111.255.255.255 111.0.0.0 RFC1918 filtering 169.254 windows The most significant bit pattern determines the class of the address, as well as how many bits make up the network portion of the address. Class A addresses include Range of network numbers: 1.0.0.0 to 126.0.0.0 Number of host addresses: 16,777,214 Class B addresses include Range of network numbers: 128.1.0.0 to 191.254.0.0 Number of host addresses: 65,534 Class C addresses include Range of network numbers: 192.0.1.0 to 223.255.254.0 Number of host addresses: 254 Class D addresses include Range of network numbers: 224.0.0.0 to 239.255.255.254 The most significant bit pattern determines the class of the address, as well as how many bits make up the network portion of the address. Class A addresses include Range of network numbers: 1.0.0.0 to 126.0.0.0 Number of host addresses: 16,777,214 Class B addresses include Range of network numbers: 128.1.0.0 to 191.254.0.0 Number of host addresses: 65,534 Class C addresses include Range of network numbers: 192.0.1.0 to 223.255.254.0 Number of host addresses: 254 Class D addresses include Range of network numbers: 224.0.0.0 to 239.255.255.254 Purpose: This figure describes network structure when subnets are used. Emphasize: The host bits of an IP address can be subdivided into a subnetwork section and a host section. The subnetwork section in this example is the full third octet. Point out the difference in the addressing between the previous slide and this slide. A subnetted address space is like a highway with exits. A network device uses a subnet mask to determine what part of the IP address is used for the network, the subn