how to calculate subnet

In project implementation and network device debugging, we often need to find the subnet mask and default gateway of the device so as to correctly configure devices such as routers, switches, and firewalls. Obtained through web query Here is a tip: You can visit the MISCOMP site and query through Web pages.The specific URL is:Http://fncdug1.fnal.gov/misnet/systemName.htmlAfter logging on to this page, the following figure is displayed: 498

This article describes in detail how to configure network IP addresses. What operations do we need? I believe that reading this article will help you. A few days ago, the netizen harcsbg encountered a strange subnet mask problem during network IP address configuration. harcsbg asked for help in the ccid it community. Dear experts, I have encountered a strange problem in network IP address configuration today. Please help me analyze it. Network Environ

15.7 multi-subnet failover clusters15.7.1 Multi-subnetSQL Server 2012 introduces a stretch cluster set (Stretch Clusters) that enables clustering across geographically dispersed sites. Each failover cluster node is connected to a different subnet (or subnet group) and is therefore referred to as a multi-subnet failover

: Determine whether the IP addresses of any two computers belong to the same subnet * Source: Huawei Machine Test exercises---- -------------------------------------*/#include #include "OJ.h"#include #include using namespace STD;/* Function: Determine the IP address of the two computers is the same subnet. Prototype: int issamesubnetwork (char * pcIp1, char * pcIp2, char * pcsubnetworkmask); input parameter

A student asked me a question a few days ago, but I know little about the internet. So I asked my teacher, and I will get the answer today! IP :***.***.***.***Mask: 255.255.255.0It is divided into six subnets. How many computers can each subnet have? The answer is as follows: This question cannot be computed, because to divide subnets, it must be a power of 2 to n; otherwise, it cannot be divided. Some people say that this question is very diffic

TCP/IP Note 2. Network Layer (1) -- IP, subnet, CIDR1. IP1.1 supporting agreementIP is one of the two most important protocols in the TCP/IP system.There are also four protocols used in combination with the IP protocol:(1) ARP (Address Resolution Protocol) Address Resolution Protocol(2) RARP (Reverse Address Resolution Protocol) Reverse Address Resolution Protocol(3) ICMP (Internet Control Message Protocol) Internet Control Message Protocol(4) IGMP (I

Example 1: In this example, the number of subnets is used to divide subnets without considering the number of hosts. A group company has 12 subsidiaries and each subsidiary has 4 Departments. The superior provides a CIDR block of 172.16.0.0/16 for each subsidiary and its departments to allocate CIDR blocks. Idea: Since there are 12 subsidiaries, We need to divide them into 12 sub-network segments, but each subsidiary has 4 Departments, therefore, it is necessary to divide the CIDR blocks of each

Title DescriptionA 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

From: network security technology blog Today, I updated my article and had a holiday with hoho. "" We found that many VPS used subnet isolation during previous penetration. So I want to test whether subnet isolation can completely solve ARP IN A CIDR block. The effect of slice is gateway isolation. Let's test that, since it is subnet isolation, we can modify

All hosts are now required to support subnet addressing (RFC 950 [mogul and Postel 1985]). Not the I P addressAs a simple network number and a host number, but the host number is divided into a subnet number and a host number.The reason for this is because the Class A and Class B addresses allocate too much space for the host number, and the number of hosts that can be accommodated separately is22 4-2 and 2

/***************************************************************************** * Subnet mask, mask length relationship * Statement: * When we operate the Linux system, we often see that we can use the subnet mask, mask length to represent the mask, * for me, has been curious is the subnet mask between 1 can clip a 0, if the clip 0, the mask length * bad calculati

1. How many subnets will be generated The X power of 2-2 (X represents the mask bit, that is, the part of the binary system that is 1. In the current network,-2 is no longer required and can be used in all, however, you need to add the corresponding configuration commands. For example, you can use all the commands by adding the IP subnet zero command to the Cisco router .) Note: I have read a lot of books, and now the number of subnets does not ne

"Data Collation" Cisco [OSI, IP Address, Network Segment, Subnet Mask]###concept###----------------------from20110712to201107161.networksegment{ Router;switch;bridge;} 2.lanblocks{broadcastdomain;broadcaststorm;multicast;lowbrandwidth;} 3.benefitsoftherouter{!forwardbroadcast;filtermsgsonlayer-3 ( Networklayer);} 4.benefitsoftheswitch{enhancelanperformance;supplymore Blandwidth;} 5.collisiondomain{datapacketscancollidewithoneanother Whenbeingsentonash

The IP address consists of 32 bits, divided into four segments, consisting of a network number and a host number. Also divided into a b C D e Five address, where a B class C address for distribution to the global network users, D E class is a special address.1, Class A address 1.0.0.0 to 126.255.255.255Only the first paragraph is the network number, and the remaining three paragraphs are the host number. In binary notation, there are 8 bits, or one byte is the network number, and 24 bits, or thr

Subnet MaskCalculator-Subnet Mask Calculator Http://bbs.szwblm.com/dv_rss.asp? S = XHTML boardid = 15 id = 25017 page = 6 The subnet mask (subnet mask) is also called the network mask, address mask, and subnetwork mask, it is used to indicate which bits of an IP address are the

Terms 1, IP address: is a 32-bit binary decimal number representation such as: 192.168.1.1--11000000.10101000.00000001.00000001 2, Subnet mask: is a network bit full ' 1 ', host bit full ' 0 ' dotted decimal notation such as: 255.255.255.0--11111111.11111111.11111111.00000000 3, network address: In the IP address of the network part of the same, the main opportunity of the total ' 0 ' number such as: 192.168.1.0--11000000.10101000.00000001.00000

/*** Function name: validatemask* Function: verify the validity of the subnet mask.* Function Author: 236f (fuwei236 # gmail.com)* Input parameter: maskstr: The subnet mask in dotted decimal format (for example, 255.255.255.192)* Main function:* Call the function: _ checkiput_fomartip (IP)* Return value: true: maskstr is a valid subnet mask.* False: maskstr is an

The router interface receives a route update. Check whether the route entry belongs to the same master-class network and the same master-class network. Tutorial topology: 650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M01/49/44/wKioL1QRp6DQ01umAADRRTiCeRI854.jpg "style =" float: none; "Title =" clipboard.png "alt =" wkiol1qrp6dq01umaadrrticeri854.jpg "/> The subnet mask of the port is used as the subn