IPv4 had a subnet mask (dotted quad notation) that was later replaced by CIDR masking.IPv6 doesn’t have a subnet mask but instead calls it aPrefix Length, often shortened to “Prefix”. Prefix length and CIDR masking work similarly;The prefix length denotes how many bits of the address d...
11111111 11111111 11111111 00000000中,前三个字节全1,代表对应IP地址中最高的三个字节为网络地址;后一个字节全0,代表对应IP地址中最后的一个字节为主机地址。这种位模式叫做子网模(subnet mask)或“子网掩码”。 为了使用的方便,常常使用“点分整数表示法”来表示一个IP地址和子网掩码,例如B类地址子网掩码(1111...
关闭预览 想预览更多内容,点击免费在线预览全文 免费在线预览全文 IP地址与子网掩码(IP address and subnet mask) IP地址与子网掩码(IP address and subnet mask) IP address and subnet mask 1, IP address: Internet networks are interconnected by different physical networks, and computer communications betwee...
Each of the address classes has a different default subnet mask. You can identify the class of an IP address by looking at its first octet. Following are the ranges of Class A, B, and C IP addresses, each with an example address:...
网络号和主机号的划分需要用一个额外的子网掩码(subnet mask)来表示,而不能由IP地址本身的数值决定,也就是说,网络号和主机号的划分与这个IP地址是A类、B类还是C类无关,因此称为Classless的。这样,多个子网就可以汇总(summarize)成一个Internet上的网络,例如,有8个站点都申请了C类网络,本来网络号是24位的,...
1)子网掩码(Subnet Mask: 又叫网络掩码、地址掩码,必须结合IP地址一起对应使用。子网掩码不能单独存在,它必须结合IP地址一起使用,它的主要作用有两个: 一是就是将某个IP地址划分成网络地址和主机地址两部分,并说明该IP地址是在局域网上,还是在远程网上。
Almost all decimal subnet masks convert to binary numbers that are all ones on the left and all zeros on the right. Some other common subnet masks are: Expand table DecimalBinary 255.255.255.1921111111.11111111.1111111.11000000 255.255.255.2241111111.11111111.1111111.11100000 ...
Almost all decimal subnet masks convert to binary numbers that are all ones on the left and all zeros on the right. Some other common subnet masks are: Expand table DecimalBinary 255.255.255.1921111111.11111111.1111111.11000000 255.255.255.2241111111.11111111.1111111.11100000 ...
For example, for the IP address 10.17.20.4 and a mask of 255.255.255.0 the subnet is 10.17.20.0 and the host id is 4. The broadcast address within the 10.17.20.0 subnet is when the host id portion of the address is made up of all binary 1s. In this example the host portion is ...
[Switch] display fib 1.1.1.1 verbose Route Entry Count: 1 Destination: 1.1.1.1 Mask : 255.255.255.255 Nexthop : 0.0.0.0 OutIf : NULL0 LocalAddr : 0.0.0.0 LocalMask: 0.0.0.0 Flags : BHSU Age : 1091sec Why the Static Route Is Not Displayed in the display ip routing-table Command Outp...