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portant; overflow-wrap: break-word !important;">屡次有朋友问到关于ip地址的计较他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，经过ip地址的换算他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，可以反应出我们对ip地址的熟练程他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码， 我们在做关于收集项目他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，都是在与ip地址打交道他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，熟练的把握ip地址可以削减项目中出错的几率与提升工作的效力他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，本期弱电行业网就和大师经过这五个题目他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，来完全的领会ip地址他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，五个关卡他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，你能过几关？portant;">
portant; overflow-wrap: break-word !important;">第一关
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; background-color: rgb(255, 251, 0);">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(62, 62, 62); font-family: Optima-Regular, PingFangTC-light; font-size: 15px; letter-spacing: 0.544px; text-align: left; text-indent: 34px;">已知一个ip地址是192.168.1.1他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，子网掩码是255.255.255.0他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，那末它的收集地址是几多？
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">在领会这个题目之前他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，我们先需方法会下他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，什么是收集地址？
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">ipP地址是由两部分组成：收集地址+主机地址。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">收集地址可以肯定ip地址的范围他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，ip地址实在跟身份证号比力像。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(217, 33, 66);">portant; overflow-wrap: break-word !important;">一小我身份证：portant; overflow-wrap: break-word !important;">共18位：
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">前6位暗示的是省、市、县区；
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">7到14位暗示是诞生年月他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">15、16位暗示是派出所。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">第17位是性别。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">而收集号就是相当于身份证的省、市、县区。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">那末若何来算出收集地址呢？
portant;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important;">具体计较
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">将ip地址192.168.1.1转换为二进制
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">11000000.10101000.00000001.00000001portant; overflow-wrap: break-word !important; font-size: 15px;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">将子网掩码255.255.255.0转换成二进制
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">11111111.11111111.11111111.00000000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">然后将两者相“与（and）"运算：
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; box-sizing: border-box !important; overflow-wrap: break-word !important;">11000000.inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; box-sizing: border-box !important; overflow-wrap: break-word !important;">10101000.inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; box-sizing: border-box !important; overflow-wrap: break-word !important;">00000001.inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; box-sizing: border-box !important; overflow-wrap: break-word !important;">00000001portant; overflow-wrap: break-word !important; font-size: 15px;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">11111111.11111111.11111111.00000000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">然后获得：
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; box-sizing: border-box !important; overflow-wrap: break-word !important;">11000000.10101000.00000001.00000000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">转换成收集地址就是：192.168.1.0
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">第二关
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(62, 62, 62); font-family: Optima-Regular, PingFangTC-light; font-size: 15px; letter-spacing: 0.544px; text-align: left; text-indent: 34px; background-color: rgb(255, 251, 0);">已知某主机的ip地址是192.168.100.200他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，子网掩码为255.255.255.192他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，其收集内可用的ip地址个数为几多？
portant;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important;">具体计较
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">将子网掩码255.255.255.192转换为二进制
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">11111111.11111111.11111111.11000000
portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">子网掩码共有26位他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，还有6位可用。
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">即2的6次方减去2他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，即是62他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，即有62个ip地址可用。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
portant;">
portant; overflow-wrap: break-word !important;">第三关
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; background-color: rgb(255, 251, 0);">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(62, 62, 62); font-family: Optima-Regular, PingFangTC-light; font-size: 15px; letter-spacing: 0.544px; text-align: left; text-indent: 34px;">某公司申请到一个C 类IP 地址他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，只毗连6 个子公司他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，最大的一个子公司有26 台计较机他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，每个子公司都分派在同一个网段他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，则子网掩码应设为几多合适？
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; white-space: normal; text-indent: 34px; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">首先一个C类的子网掩码为255.255.255.0他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，这个是最原始。portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">但现在我们是有要求：
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">1、毗连6个子网
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">2、且最大一个子网的ip地址为26个。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">若何来设备这个子网掩码呢？inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.544px; widows: 1; background-color: rgb(243, 243, 243); box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">
portant;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important;">具体计较
portant; overflow-wrap: break-word !important; font-size: 15px;">收集合的原则是ip地址与子网掩码越越精准他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">网portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">络越易治理他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，故障越低。portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">首先来portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">分portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">析2的2次方portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">即是4他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，2的3portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">次方等portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">于portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">8他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，
portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">所以最正确portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">网portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">络中是portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">容portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">纳8个子网他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，最接近6个子网的分别portant; overflow-wrap: break-word !important; letter-spacing: 0.544px; font-size: 15px;">即为255.255.255.224。portant; overflow-wrap: break-word !important; font-size: 15px;">我们再来考证下他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，每个子网的主机数目。portant; overflow-wrap: break-word !important; font-size: 15px;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">子网掩码255.portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">255.255.portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">224转化为二进制为：
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px; color: rgb(217, 33, 66);">11111111.11111111.11111111.111portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">00000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">子网掩码为27位他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，那末主机位数为5位。
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">即可包容的主机数为2的5次方减2他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，即是30。
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">完全合适一个子网内包容26个ip地址。
portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">所以终极的子网掩码为255.255.255.224
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">第四关
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; background-color: rgb(255, 251, 0);">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">一个A类ip地址的子网掩码是255.255.240.0他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，共有几位被用来划份子网？portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">且可以分别几多个子网？每个子网ip地址数目是几多？
portant;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important;">具体计较
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">将子网掩码255.255.240.0转换为二进制
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">11111111.11111111.11110000.00000000
portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">子网掩码共有20位他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，而一个A类的ip地址的子网掩码是8位他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，即有12位被用来划份子网。
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">所以子网数为：2的12次方=4096个子网。
portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(217, 33, 66);">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">那末每个子网的主机数是几多呢？
portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">由于ip地址为32位他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，收集号已为20位他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，则主机数12位。portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">每个子网中的ip数目为portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">2^12=4096他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，可是可以分派给计较机利用的只要4096-2=4094个他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，（减去一个收集地址与一个广播地址）。
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">第五关
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; background-color: rgb(255, 251, 0);">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; color: rgb(0, 0, 0); font-size: 15px;">10.135.255.19/255.255.255.248的广播地址是什么？
inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">计较思绪他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，要获得广播他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，先得出收集地址他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，然后把收集地址的主机位全换成1他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，便就是广播地址。
portant;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important;">具体计较
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">将ip地址10.135.255.19转换为二进制
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">00001010.10001001.11111111.00010011
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">将子网掩码255.255.255.248转换成二进制
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">11111111.11111111.11111111.11111000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">然后将两者相“与（and）"运算：
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">00001010.10001001.11111111.portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">00010011
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">11111111.11111111.11111111.11111000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">然后获得：
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">00001010.10001001.11111111.portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">00010000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">转换成收集地址就是：10.135.255.16
portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">那末广播地址是几多呢?portant; overflow-wrap: break-word !important; font-size: 15px;">
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">从子网掩码可以看出他早就发现系统有个隐藏的缝隙私下花了好几个早晨优化了代码，这个子网掩码是29位。
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; color: rgb(217, 33, 66);">11111111.11111111.11111111.11111portant; overflow-wrap: break-word !important; font-size: 15px;">000
portant; overflow-wrap: break-word !important;">
portant; overflow-wrap: break-word !important; font-size: 15px;">也就是主机数还有3位可用。portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px; color: rgb(217, 33, 66);">portant; overflow-wrap: break-word !important; letter-spacing: 0.544px;">00001010.10001001.11111111.00010portant; overflow-wrap: break-word !important; font-size: 15px;">000
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">把收集地址的前面三个零全换成1。
portant; overflow-wrap: break-word !important;">portant; overflow-wrap: break-word !important; font-size: 15px;">即可得出广播地址为：portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">10.135.255.2portant; overflow-wrap: break-word !important; font-size: 15px; letter-spacing: 0.544px;">3
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inkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 17px; letter-spacing: 0.544px; text-align: justify; white-space: normal; box-sizing: border-box !important; overflow-wrap: break-word !important;"> |
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发表于 2025-7-26 14:03