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The most direct role of the subnet mask is to determine whether the IP address is within the same network segment as another IP address.
Here is a simple look at the basic configuration of IP on a computer
IP Address: 192.168.0.5
Subnet Mask: 255.255.255.0
Default gateway: 192.168.0.1
Example above, IP address,
One day, using Centos7, when discovering the network configuration, the subnet mask needs to be converted manually, because the CENTOS7 network is configured as follows:NMCLI Connection Enp4s0 Modify Ipv4.methord manual ipv4.address "192.168.1.120/24" Ipv4.gateway "192.168.1.1" Ipv4.dns "2 23.5.5.5 "A configuration item with no subnet
IntroductionThis article describes what the IP address and its function and IP address composition, IP address classification, IP subnet partition, subnet mask, public address, private address,VLSM (variable eldest son netmask), CIDR (Non-class inter-domain routing) and other CCNA basics.Article Directory0x1. What is an IP addressthe role of the 0X2.IP address0x3
IP address and subnet mask used for computingAfter knowing the IP address and subnet mask, you can calculate:1. Network Address2. broadcast address3. Address range4. Several hosts on this websiteExample 1: the IP address in the following example is 192 · 168 · 100 · 5. The
First of all, our premise is the local area network, so we mentioned the modification more specifically, is to find the subnet mask and the default gateway for proper padding.
Here are two specific ways to do this:
Method One, we find any other networked computer on the same LAN, locate and double-click the local connected Internet Protocol (TCP/IP) entry, and populate the
Not much to say, directly on the code.
Package com.ckw.test;
Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import java.util.*;
Import Java.util.Map.Entry;
public class Testofsubnetmask {map
The results are:
---------------------------------------------------------------Windows IP Configuration host name ............. : DADI primary DNS suffix ........... : node type ............: mixed IP routing enabled ..........: no WINS agent enable
Label: SP data BS amp network nbsp c ip computer When I used to configure a static IP address for a linked router, I only knew to change the subnet mask to 255.255.255.0. Just change the first three digits of the IP address and the last digit of the gateway to an unused IP address, I have never understood what the subnet mas
Write the code in half yesterday, suddenly thought, before the test is manually input subnet mask, so think how to automatically get the subnet mask, so on Google, found that there is really something, maybe I am more stupid, can not understand other people's Code, Also because the code found rarely commented (this may
What is an IP addressThe so-called IP address is a 32bit address assigned to each host connected to the Internet. In accordance with the TCP/IP protocol, IPs are represented by binary, each IP address is 32bit long and bits are converted to bytes, which is 4 bytes. For example, a binary form of the IP address is "00001010000000000000000000000001", so long address, people are too laborious to deal with. In order to facilitate people's use, IP addresses are often written in decimal form, using sym
Technorati label: Subnet Mask, Network
Subnet Mask and network address
A valid broadcast address is the network address of the host plus the largest host number. The network address is obtained by bitwise AND the machine's IP address and subnet
Summing up, learn today about through the Socket,ioctl to obtain ip,netmask and other information, many of which refer to a lot of information on the Internet, I will list theI use this function, is the following function, which has some global variables, very understood, do not do more explanationOne. Here is a comment on this function:int get_nic_ip_address ()//Get each NIC IP address, subnet mask{struct
If a unit has multiple networks distributed across different regions and there are not many hosts on each NETWORK, applying for multiple NETWORK IDs will not only waste IP addresses, in addition, the Unit will pay a large economic cost. In this case, multiple subnets can share a single website address to save IP addresses and money. Next we will introduce the process of using the subnet mask to achieve this
method One:
First locate any other networked computer on the same LAN, and then double-click the Local Internet Protocol (TCP/IP) entry, and fill in the default gateway and subnet mask inside the computer.
Method Two:
1, find the same LAN other normal operation of the computer, click on the Win+r key combination, in the pop-up dialog box directly input cmd, and then click Enter;
2, came to the
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)), "
: Because the subnet mask determines the number of network bits and host bits, of course, to see the subnet mask, into the binary system namely: 11111111.11111111.11111000.00000000,There are 21 consecutive 1 that is the network bit 21,host bit =32-21=11Then the number of hosts is (2 of 11 square-2), why should reduce 2
/** * Get broadcast address * */public static String getbroadcastaddress (string subnet, string IP) {string[] ips = ip.split ("\ \."); string[] subnets = subnet.split ("\ \"); StringBuffer sb = new StringBuffer (), for (int i = 0; i Get the Java implementation of the broadcast address based on the IP address and subnet mask
Subnet Mask and IP address operation subnet mask: function: divide an IP address into two parts: network address and host address. Once the subnet mask is set, the network address and host address are fixed. Calculation: Convert t
The subnet address and broadcast address are not given directly because the condition is given precedence. However, these two parameters require that we use the IP address and subnet mask to derive the subnet address and broadcast address. Ideas are as follows:1. The subnet
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
I don't need to analyze it professionally. I use dummies to answer questions.
This is a simulated question. Use this question as an example.
URL type: Of course, it is Class B.
Convert the IP address and subnet mask to binary, and then perform operations on them.
145.189.24.3 10010001 10111101 00011000 00000011
201710000224.0 11111111 11111111 11100000 00000000
Network Address:
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