subnet cal

Transferred from: http://baike.baidu.com/view/65511.htm Http://baike.baidu.com/view/878.htm The IP address is the network number and host number to represent the host on the network, only in a network number under the computer can be "direct" interoperability, different network number of the computer through the gateway to exchange. But such a division does not seem very flexible in some cases. For this reason, the IP network is also allowed to be partitioned into smaller networks called subnet

IP subnetting and variable length subnet masks (vlsm) Subnetting Basics Advantages of subnetting: 1. reduce network traffic 2. Improve Network Performance 3. simplified management 4. Easy to expand geographic scope How to creat subnets How do I 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, and 512, respectively. it is also worth noting that the

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

Knowledge of Over 255 computer IP addresses and subnet masks We all know that IP addresses are composed of four digits. Here, let's take a look at three common types of IP addresses.Class a ip segments 0.0.0.0 to 127.255.255.255Class B IP segments 128.0.0.0 to 191.255.255.255C-type IP segments 192.0.0.0 to 223.255.255.255 The default subnet mask allocated by XP is only 255 or 0 for each segment.Class A defa

Non-symmetric network failure is caused by subnet mask faultsNetwork connectivity is a common phenomenon. I believe many people will focus on Network cables, Nic drivers, and nic parameters. When checking Nic parameters, they may also focus on key parameters such as IP addresses, Gateway Addresses, DNS servers, and DHCP servers. In fact, there is also a network parameter-subnet mask, which is also very impo

You must know something about the IP address, right? We know that the TCP/IP protocol that is widely used in the Internet is to differentiate between different hosts by using IPs. If you've ever had a TCP/IP protocol set up, then you're bound to encounter the term subnet mask (Subnet mask), so do you know what a subnet mask is? What role does it have?We know that

As we all know, IP is made up of four numbers, here, let's first look at the Class 3 commonly used IPClass A IP segment 0.0.0.0 to 127.255.255.255Class B IP segment 128.0.0.0 to 191.255.255.255Class C IP segment 192.0.0.0 to 223.255.255.255　　The default subnet mask assigned by XP is only 255 or 0 per segmentClass A default subnet mask 255.0.0.0 a subnet can hold

the limited broadcast address ). * "0" Address According to the TCP/IP protocol, all the "0" Network numbers are interpreted as "local" networks. * Return address Class A network address 127 is a reserved address for network software testing and communication between local processes. It is called loopback address ). WhateverProgramOnce data is sent using the return address, the protocol software returns immediately without any network Transmission. According to TCP/IP protocol, 1. Gr

Tutorial on TCP/IP Subnet Mask 1. Default class A, B, and C addresses, subnet mask; Ii. Role of subnet mask:IP address 192.20.15.5 11000000 00010100 00001111 00000101Subnet Mask 255.255.0.0 11111111 11111111 00000000 00000000Network ID 192.255.0.0 11000000 00010100 00000000 00000000Host ID 0.0.15.5 00001111 00000101Calculate the number of hosts in this

Tutorial on TCP/IP Subnet Mask 1. Default class A, B, and C addresses, subnet mask; Ii. Role of subnet mask: Code:IP address 192.20.15.5 11000000 00010100 00001111 00000101Subnet Mask 255.255.0.0 11111111 11111111 00000000 00000000Network ID 192.255.0.0 11000000 00010100 00000000 00000000Host ID 0.0.15.5 00001111 00000101 Calculate the number of hosts in this

disadvantages of ipv4 have gradually been exposed, that is, the network number occupies too many places, and the number of hosts is too small, so the host addresses it provides become increasingly scarce, currently, in addition to using the reserved IP address to allocate nat addresses within an enterprise, a high-class IP address is usually divided to form multiple subnets for use by different user groups.This is mainly to effectively use the IP address in the case of network segmentation. By

We will learn about subnets and CIDR (classless Inter-Domain Routing. We hope to learn this knowledge more easily than some books provide.Let's first figure out one thing: there is no "category" in the subnet. In the past, networks were divided into Class A, Class B, and class C. These networks can only be divided into equal parts. Therefore, we have introduced a variable length Subnet Mask (VLSM) to solve

IP address, subnet mask, network number, host number, network address, host address, IP address IP Address: 4-segment decimal, 32-bit binary, for example, 192.168.1.1 binary is: 11000000 | 10101000 | 00000001 | 00000001The subnet mask shows how many bits are the network number and how many bits are the host number.: 255.255.255.0 binary: 11111111 11111111 11111111 0000000024-bit network number, that is, all

You must know something about the IP address, right? We know that the TCP/IP protocol that is widely used in the Internet is to differentiate between different hosts by using IPs. If you've ever had a TCP/IP protocol set up, then you're bound to encounter the term subnet mask (Subnet mask), so do you know what a subnet mask is? What role does it have?We know that

The IP address is composed of four digits. Here, let's take a look at three common IP addresses.Class a ip segments 0.0.0.0 to 127.255.255.255Class B IP segments 128.0.0.0 to 191.255.255.255C-type IP segments 192.0.0.0 to 223.255.255.255The default subnet mask allocated by XP is only 255 or 0 for each segment.Class A default subnet mask 255.0.0.0 a subnet can acc

Subnet Mask is the basic knowledge that each network administrator must master. Only by mastering it can you truly understand the TCP/IP protocol settings. The following describes what a subnet mask is. IP address Structure To understand what a subnet mask is, you must understand the composition of IP addresses. The Internet is composed of many small networks, ea

On the Internet to find a special detailed introduction, write the special fine, everyone slowly look down:As we all know, IP is made up of four numbers, here, let's first look at the Class 3 commonly used IPClass A IP segment 0.0.0.0 to 127.255.255.255Class B IP segment 128.0.0.0 to 191.255.255.255Class C IP segment 192.0.0.0 to 223.255.255.255The default subnet mask assigned by XP is only 255 or 0 per segmentClass A default

"Huawei OJ" "Algorithm Total chapter" "Huawei OJ" "075-Determine whether two IP belongs to the same subnet" project download "title 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, wh

, and so on). The network address is used for routing, and the host address is used to find a separate host within the network or subnet. An IP address makes it possible for future data from source addresses to be routed to the destination address. Second, MAC addressfor MAC address, because we do not directly contact with it, so people are not necessarily familiar. In the OSI (Open System interconnection, open systems interconnect) 7-Layer Network Pr

We know that the IP address is a 4-byte (total 32bit) number, divided into 4 segments, 8 bits per segment, and periods separated by a period. For ease of expression and recognition, the IP address is expressed in decimal form such as 210.52.207.2, each paragraph can represent the maximum number of decimal not more than 255. The IP address consists of two parts, the network number (Netgwork ID) and the host ID. The network number identifies a subnet on