tcp/ip协议dns-阿里云

IP协议, TCP协议和DNS 服务分别是干什么的？

一，IP 协议IP协议的英文是 Internet Protocol. 它属于昨天我们学习的网络层。IP 协议的作用是把各种数据包传送给对方。如果想确保数据包能顺利到达目的地，需要满足的2个最重要的条件就是IP 地址和MAC (Media Access Control Address) 地址...

从前端资源的dns/tcp的角度看页面性能

通过资源加载中的dns/tcp，来看lcp和fcp和loading time。不一定是dns/tcp和lcp或者fcp有直接关系。就是想看看到底数据箱体在什么范围区间内。DNS 根据实际生产数据，将14天内页面所有资源加载的dns数据进行绘制得到以下图表。2. TCP3 LOAD4.LCP5.FC...

netty系列之:来,手把手教你使用netty搭建一个DNS tcp服务器

简介在前面的文章中，我们提到了使用netty构建tcp和udp的客户端向已经公布的DNS服务器进行域名请求服务。基本的流程是借助于netty本身的NIO通道，将要查询的信息封装成为DNSMessage,通过netty搭建的channel发送到服务器端，然后从服务器端接受返回数据，将其编码为DNSRe...

【图解Http 学习摘要】二、IP，TCP 和 DNS、三次握手

IP、TCP 和 DNS，首先这三者都是 TCP/IP 协议族中的协议，与 http 的关系密不可分。一、IP 协议IP（Internet Protocol），是网际协议，位于网络层。它是整个TCP/IP协议族的核心，也是构成互联网的基础。注意这里不要和 IP地址搞混淆：IP协议&#...

手把手教你在netty中使用TCP协议请求DNS服务器

简介DNS的全称domain name system，既然是一个系统就有客户端和服务器之分。一般情况来说我们并不需要感知这个DNS客户端的存在，因为我们在浏览器访问某个域名的时候，浏览器作为客户端已经实现了这个工作。但是有时候我们没有使用浏览器，比如在netty环境中，如何构建一个DNS请求呢？DN...

DNS同时占用UDP和TCP端口53——传输数据超过512时候用tcp，DNS服务器可以配置仅支持UDP查询包

DNS同时占用UDP和TCP端口53是公认的，这种单个应用协议同时使用两种传输协议的情况在TCP/IP栈也算是个另类。但很少有人知道DNS分别在什么情况下使用这两种协议。先简单介绍下TCP与UDP。 TCP是一种面向连接的协议，提供可靠...

why DNS use both UDP and TCP

本文出自Simmy的个人blog：西米在线 http://simmyonline.com/archives/72.html   It's common to know that DNS use both protocal UDP and TCP for data transmis...

TCP/IP 域名系统DNS

简介 DNS的作用就是把应用层的主机名映射为网络层的IP地址。上图展示了DNS的作用。（学会讲故事，将内容贯穿起来）为了得到层次化的名字空间，人们设计了域名空间，如下图所示：下面是一个具体的示例: 域域domain是域名空间中的子树。域的名字就是这个子树顶部结点的名字。域本身可以划分为若干...

结合Wireshark捕获分组深入理解TCP/IP协议栈之DNS协议

摘要：本文简单介绍了DNS协议理论知识，给出URL解析步骤，详细讲述了DNS报文各个字段含义，并从Wireshark俘获分组中选取DNS相关报文进行分析。一、概述 1.1 DNS 识别主机有两种方式：主机名...

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更新时间 2023-01-16 09:10:35

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