I recently reviewed some network knowledge and saw the subnet mask. The subnet mask is encountered in actual use and tests, but the calculation of the subnet mask involves binary conversion, it is troublesome. This time, I saw a simple calculation method for the subnet mask on the network and forum. For how to
After an organization applies for an IP address, it may need to further divide the IP address into subnets. For example, a large company applies for a Class B IP address 166.133.0.0. If you use the standard subnet mask 255.255.0.0 without further dividing subnets, all hosts in the 166.133.0.0 Network (a maximum of 65534 hosts) will be in the same broadcast domain, A large number of broadcast data packets in the network will make the network unavailabl
Fast subnet division method subnet division basics: subnetting advantages: 1. reduce network traffic 2. improve Network Performance 3. simplified Management 4. how to Create a subnet that is easy to expand the geographical scope: how to divide subnets? First, you must note that the power of 2: The power of 2 0 to the power of 9 are: 1, 2, 4, 8, 16, 32, 64,128,256
Subnet mask (Subnet masks):
The subnet mask is used to identify which part of the IP address is a network address. Which part is the host address, there are 1 and 0 components, long 32 bits, all 1 of bits represent the network number. Not all networks require subnets, so there are 1 concepts: The default subnet mask (
Subnet Mask:What is a subnet mask subnet mask cannot exist alone,It must be used in conjunction with an IP address. The subnet mask has only one effect,is to divide an IP address into two parts: network address and host address.The subnet mask setting must follow certain rul
Many people are certainly not familiar with the subnet mask setting, which is a headache. Now I will tell you how to easily calculate the subnet mask and help people who like to be lazy :)
Everyone should know how many hosts are between the power 0 and the power 10 of 2? Let us also say that they are:1 2 4 8 16 32 64 128 256 512 1024.
If you want only five IP
is usually a broadcast address and a network address in the IP address. These two addresses are generally unavailable. You can refer to the details www.2cto.com 5. IP address range algorithm: 1) company IP address information query: (for example, 113.73.0.0 or 113.73.0.0/17) Yangge recommends a better method: http://soc.taobao.com:9999/soc/extend/?extend_feature=acl The ACL management tab in the macro-defined query. You can use it later. The valid IP address range (113.73.0.0-113.73.127.255) in
The subnet mask (subnet mask) is also called the netmask, address mask, and subnet mask, which is used to indicate which bits of an IP address identify the host's subnet and which bits identify the host's bitmask. The subnet mask cannot exist alone, it must be used in conjun
IP addresses, subnet masks, and gateways in network management are the basic knowledge that each network administrator must master. Only by mastering them can you really understand the TCP/IP protocol settings. The following describes what a subnet mask is.To understand what the subnet mask is, you must understand the composition of the IP address. The Internet i
What are IP addresses, subnet masks, routes, and gateways? Often friends ask me, indeed these terms are often seen by us, today to the people to talk about the meaning of these terms:1.IP Address:The IP address has a 32-bit connection address, consisting of 4 8-bit fields, a 8-bit field called a 8-bit group, and each 8-bit group is separated by a dot to identifyTCP/IP host. Each IP address contains two parts: the network ID and the host ID, the networ
calculation:I P address 1102.16.10101000.00000000.00000100Subnet Mask 11111111.111111.1111111111.00000000And Operation
111000000.10101000.00000000.00000000Converted to decimal:
192.168.0.0
After the and operation on the IP addresses and subnet masks of the three groups of computers, we can see that the operation results are the same. All are 192.168.0.0
Therefore, the computer will regard the three computers as the same sub-network and then communica
In TCP/IP, subnet masks are used to determine whether hosts on the network are in the same network segment. In A large network, the subnet masks of class a are 255.0.0.0, The subnet masks of class B is 255.255.0.0, And the SUBNET MASKS of CLASS C is 255.255.255.0.
Assume that the s
: 000000000.oC: 255.255.255.0
You can use a subnet mask to determine the network number and host number of an IP address. You can use the IP address and the corresponding subnet mask to calculate the network number and host number.For example, 10.68.89.1 is a Class a ip address. Therefore, the default subnet mask is 25
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 A
principle is very simple, using the ARP protocol to broadcast their own IP address to the network, if the response there is an IP conflict, this function in the tcp/ The first volume of the IP protocol ARP protocol chapter is described in detail. This first uses the ping command to probe the set IP address, and then in the ARP cache to find out if there are valid records, if any, there is an IP conflict. There is no need to care whether the ping command succeeds, whether or not it succeeds, as
Summary:
Class A, B, C is actually the concept of address block, the so-called application of a class C address, refers to the application of a Class C address block.
C class Address block of specific IP address of this class C address block, of course, also belong to Class C address classes.
A subnet mask is a subnet, such as a number of 200多万个 address blocks that divide the entire IP address into Class A,
First, what is a subnetThe IP address consists of two parts, the network ID and the host ID. The network number identifies a subnet on the internet, and the host number identifies a host in the subnet. A subnet is a smaller network that is based on a particular type of address.Second, why to divide the subnetThe Internet organization defines five IP addresses, wi
Topic: Solution for subnet mask faults of switches: Fault Phenomenon: Asymmetric Network Access failure, troubleshooting: Firewall and telecommunications? Subnet Mask. Fault Summary: Why can't I access the Internet but cannot connect to the headquarters? fault tips: the important role of subnet mask.
Network connectivity is a common phenomenon. I believe many peo
This article mainly introduces the logic judgment of js for IP addresses, subnet masks, and gateways. If you are interested, refer to the js verification for static address configuration, I found a lot of information about ip addresses and masks on the Internet. I didn't have ip addresses, submask, or gateway logic judgments. I wrote my own code for reference.
Common knowledge about Gateway addresses:
First:And c
Understand these pointsL How many subnets will be generated by the subnet mask you select2 x -2 (x represents the number of bits of the network bit borrowing host, that is, 2 into 1 parts, now the network is no longer required-2, can be used all, but need to add the corresponding configuration commands,L How many hosts each subnet can have2 of the Y-square -2 (Y for the host bit, that is, 2 in 0 parts)L a v
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