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<!doctype html><html lang=en><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="IE=edge,chrome=1"><title>What-happens-type-url-into-browser-and-press-enter - stardustman</title><meta name=renderer content="webkit"><meta name=viewport content="width=device-width,initial-scale=1,maximum-scale=1"><meta http-equiv=cache-control content="no-transform"><meta http-equiv=cache-control content="no-siteapp"><meta name=theme-color content="#f8f5ec"><meta name=msapplication-navbutton-color content="#f8f5ec"><meta name=apple-mobile-web-app-capable content="yes"><meta name=apple-mobile-web-app-status-bar-style content="#f8f5ec"><meta name=author content="stardust"><meta name=description content="dns query get the ip of the target domain browser cache firefox(about:networking#dns) /etc/hosts os cache macos 查看 dns 请求日志 sudo log stream &amp;ndash;predicate &amp;lsquo;process == &amp;ldquo;mDNSResponder&amp;rdquo;&amp;rsquo; &amp;ndash;info dns resolver /etc/resolv.conf arp -a 查看有没有 dns 服务器的 mac 地址 ARP request for the nameserver send dns query to get the ip of the domain arp 获取 gateway 的 mac"><meta name=keywords content="Hugo,theme,even"><meta name=generator content="Hugo 0.119.0 with theme even"><link rel=canonical href=http://stardustman.github.io/2021/09/11/what-happens-type-url-into-browser-and-press-enter/><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/manifest.json><link rel=mask-icon href=/safari-pinned-tab.svg color=#5bbad5><link href=/sass/main.min.f92fd13721ddf72129410fd8250e73152cc6f2438082b6c0208dc24ee7c13fc4.css rel=stylesheet><link rel=stylesheet href=https://cdn.jsdelivr.net/npm/@fancyapps/[email protected]/dist/jquery.fancybox.min.css integrity="sha256-7TyXnr2YU040zfSP+rEcz29ggW4j56/ujTPwjMzyqFY=" crossorigin=anonymous><meta property="og:title" content="What-happens-type-url-into-browser-and-press-enter"><meta property="og:description" content="dns query get the ip of the target domain browser cache firefox(about:networking#dns) /etc/hosts os cache macos 查看 dns 请求日志 sudo log stream &ndash;predicate &lsquo;process == &ldquo;mDNSResponder&rdquo;&rsquo; &ndash;info dns resolver /etc/resolv.conf arp -a 查看有没有 dns 服务器的 mac 地址 ARP request for the nameserver send dns query to get the ip of the domain arp 获取 gateway 的 mac"><meta property="og:type" content="article"><meta property="og:url" content="http://stardustman.github.io/2021/09/11/what-happens-type-url-into-browser-and-press-enter/"><meta property="article:section" content="post"><meta property="article:published_time" content="2021-09-11T16:21:12+08:00"><meta property="article:modified_time" content="2021-09-11T16:21:12+08:00"><meta itemprop=name content="What-happens-type-url-into-browser-and-press-enter"><meta itemprop=description content="dns query get the ip of the target domain browser cache firefox(about:networking#dns) /etc/hosts os cache macos 查看 dns 请求日志 sudo log stream &ndash;predicate &lsquo;process == &ldquo;mDNSResponder&rdquo;&rsquo; &ndash;info dns resolver /etc/resolv.conf arp -a 查看有没有 dns 服务器的 mac 地址 ARP request for the nameserver send dns query to get the ip of the domain arp 获取 gateway 的 mac"><meta itemprop=datePublished content="2021-09-11T16:21:12+08:00"><meta itemprop=dateModified content="2021-09-11T16:21:12+08:00"><meta itemprop=wordCount content="98"><meta itemprop=keywords content="network,interrput,dns,"><meta name=twitter:card content="summary"><meta name=twitter:title content="What-happens-type-url-into-browser-and-press-enter"><meta name=twitter:description content="dns query get the ip of the target domain browser cache firefox(about:networking#dns) /etc/hosts os cache macos 查看 dns 请求日志 sudo log stream &ndash;predicate &lsquo;process == &ldquo;mDNSResponder&rdquo;&rsquo; &ndash;info dns resolver /etc/resolv.conf arp -a 查看有没有 dns 服务器的 mac 地址 ARP request for the nameserver send dns query to get the ip of the domain arp 获取 gateway 的 mac"><!--[if lte IE 9]><script src=https://cdnjs.cloudflare.com/ajax/libs/classlist/1.1.20170427/classList.min.js></script><![endif]--><!--[if lt IE 9]><script src=https://cdn.jsdelivr.net/npm/[email protected]/dist/html5shiv.min.js></script>
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<span class=more-meta>98 words</span>
<span class=more-meta>1 min read</span></div></header><div class=post-toc id=post-toc><h2 class=post-toc-title>Contents</h2><div class="post-toc-content always-active"><nav id=TableOfContents><ul><li><ul><li><a href=#dns-query>dns query</a><ul><li><a href=#browser-cache>browser cache</a></li><li><a href=#etchosts>/etc/hosts</a></li><li><a href=#os-cache>os cache</a></li><li><a href=#dns-resolver>dns resolver</a></li></ul></li><li><a href=#arp-获取-gateway-的-mac-地址>arp 获取 gateway 的 mac 地址</a></li><li><a href=#references>References</a></li></ul></li></ul></nav></div></div><div class=post-content><h2 id=dns-query>dns query</h2><p>get the ip of the target domain</p><h3 id=browser-cache>browser cache</h3><p>firefox(about:networking#dns)</p><h3 id=etchosts>/etc/hosts</h3><h3 id=os-cache>os cache</h3><ol><li>macos 查看 dns 请求日志 sudo log stream &ndash;predicate &lsquo;process == &ldquo;mDNSResponder&rdquo;&rsquo; &ndash;info</li></ol><h3 id=dns-resolver>dns resolver</h3><p>/etc/resolv.conf</p><ol><li>arp -a 查看有没有 dns 服务器的 mac 地址</li><li>ARP request for the nameserver</li><li>send dns query to get the ip of the domain</li></ol><h2 id=arp-获取-gateway-的-mac-地址>arp 获取 gateway 的 mac 地址</h2><h2 id=references>References</h2><ol><li><a href=http://www.science.smith.edu/~nhowe/262/oldlabs/keyboard.html>keyborad-interrput</a></li><li><a href=https://www.zhihu.com/question/560616439/answer/2722866208>Chrome 是怎么判断地址栏输入的东西是不是网址? -omnibox</a></li><li><a href=about:networking#dns>firefox dns</a></li><li><a href=https://www.fortinet.com/resources/cyberglossary/what-is-arp>ARP</a></li></ol></div><div class=post-copyright><p class=copyright-item><span class=item-title>Author</span>
<span class=item-content>stardust</span></p><p class=copyright-item><span class=item-title>LastMod</span>
<span class=item-content>2021-09-11</span></p><p class=copyright-item><span class=item-title>Markdown</span>
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## dns query

get the ip of the target domain

### browser cache

firefox(about:networking#dns)

### /etc/hosts

### os cache

1. macos 查看 dns 请求日志 sudo log stream --predicate 'process == "mDNSResponder"' --info


### dns resolver

/etc/resolv.conf

1. arp -a 查看有没有 dns 服务器的 mac 地址
2. ARP request for the nameserver
3. send dns query to get the ip of the domain

## arp 获取 gateway 的 mac 地址

## References

1. [keyborad-interrput](http://www.science.smith.edu/~nhowe/262/oldlabs/keyboard.html)
2. [Chrome 是怎么判断地址栏输入的东西是不是网址? -omnibox](https://www.zhihu.com/question/560616439/answer/2722866208)
3. [firefox dns](about:networking#dns)
4. [ARP](https://www.fortinet.com/resources/cyberglossary/what-is-arp)
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<span class=item-content>2021-09-11</span></p><p class=copyright-item><span class=item-title>Markdown</span>
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