find subnet

Description A subnet mask is a basis for determining whether the IP addresses of any two computers belong to the same subnet.The subnet mask is the same as the IP address structure, which is a 32-bit binary number, where the network number section is all "1" and the host number is all "0". Use the subnet mask to determine whether two hosts are in the same

Subnet Mask calculation: Decimal Turn binary:Decimal:23-> 111,010 Binary2|23---12|11---12|5---12|2---02|1---10Move the remainder from bottom to top, from high to Low: 10111 Binary goto decimal:Binary:11011-> 272 binary system1 (24) + 1 (23) + 0 (22) + 1 (21) + 1* (20) = 16 + 8 + 0 + 2 + 1 = 27From right to left, 2 of the N power operation, n increments from 0, and then multiplies each bit of the binary as a coefficient and the power ope

There are two ways to compute the subnet mask: Method One: Use the subnet number to calculate: 1. First of all, the number of subnets from the decimal number into binary number; 2. Then, the number of digits of the binary number obtained by the statistic is set to n; 3. Finally, the subnet mask of the address category corresponding to this IP address is first obt

IP address is composed of network address + host address so you can get the network bit + host bit = 32 bitsThe concept of the same network segment :The same network segment refers to the IP address and subnet mask, and the same net address is obtained.Want to be in the same network segment, must do network identity is the same, that is, network address. For example, Class A address: Only the first paragraph (255.0.0.0); Class B Address: First to seco

Windows Azure Platform Family of articles Catalog　　When I use Azure virtual machine VMS, I often use them in conjunction with the virtual network.But sometimes, we deploy in the virtual network subnet subnet information is wrong, I want to modify this virtual machine belongs to the subnet, how should I modify?Let me briefly introduce you here.　　1. First, we have

We can determine whether the IP address is in the same CIDR Block through the IP address directly. The following describes how the computer uses the subnet mask to determine whether the IP addresses of two hosts are in the same CIDR block ~ How can I calculate the network ID if I want to have the same network ID in the same network segment? Network Identification Algorithms for various IP addresses are differ

represents the different hosts within the network segmentAttention:Private IP is an IP address that everyone can access for use in the intranet.Let's explain what a subnet mask is, why put this concept with an IP address? Remember that because the subnet mask and IP are present together .The standard subnet mask for Class A is 255.0.0.0The standard

for virtual networks. In particular, it not only supports traditional port-based VLAN division, but also supports VLAN division based on IP addresses, subnet numbers, and protocol types, this brings great convenience to campus network management. Therefore, the new layer-3 Exchange router is used as the main device in the LAN of the campus and building. In addition to providing high bandwidth for packet forwarding and the above functions, it also pro

The Ip2long IP address is converted to an integer type.Long2ip integer data is converted to IP. The subnet mask is converted to a mask length mode:$slash _notation = strlen (Preg_replace ("/0/", "", Decbin (Ip2long ($subnet _mask)));$bits =strpos (Decbin (Ip2long ($mask)), "0"); The subnet mask bit length is converted into a