what is dns cache

A complete browser request processWhen we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?The entire process is as follows: Domain Name Resolution--

How to Make DNS changes take effect quickly OSX, chrome, and DNS During development, some IP addresses are often bound to the domain name and need to be switched frequently. in Linux, how can I quickly modify the DNS information? 1. Use the dig

1 PrefaceHTTPS plays a key role in protecting user privacy and preventing traffic hijacking, but at the same time, HTTPS also reduces user access and increases the computing resource consumption of the Web server.This article mainly describes the

Chrome resolves DNS errors, which is rare, even a bit peculiar. There is a very strange phenomenon when you use Apache to configure a virtual host today. I followed the configured steps to configure the virtual host as followsThe steps to configure

ObjectiveHTTPSIt plays a key role in protecting user privacy and preventing traffic hijacking, but at the same time, HTTPS can reduce user access speed and increase computing resource consumption of the website server.This article mainly describes

1: Users visit www.baidu.com This site, the system will first look at the DNS cache or Hosts file information, determine if there is a domain name corresponding IP resolution record, if any, directly obtain an IP address. Generally, the first

When we open the browser input URL enter, to see the page page, there are two main steps: first , the domain name to resolve the process of IP, second , through the IP to find the site server, the request to open a specific Web page, the server

resolve URL : The browser first identifies the URL that was received and extracts the Domain name field. DNS resolution : Query Browser cache (The browser caches the DNS 2-30 minutes previously received), if not found, Checks the

Basic process for Web Service basic user access to Web siteWe use Web clients every day, the browser is a Web client, such as Google Browser, and Firefox browser. When we enter the www.oldboyedu.com/time, will soon be able to see the old boy

List all network connection modes Networksetup-listallnetworkservices The results are as follows:sets the DNS server for the specified network connection mode Networksetup-setdnsservers Wi-Fi 8.8.8.8 Where Wi-Fi refers to your current network

users from the browser input URL to the page display, broken down basically by eight fast principle composition, they are:DNS parsing principle, TCP three connections, HTTP request packets, packet encapsulation, packet unpacking, a request within

What is a cache? sounds like a very technical fan, in fact, the user commonly used some "files" or other types of data to temporary storage to a place, the next time you need to use it can be read and used. This allows Windows to get cached data

Under Ms-windows, you can use the ipconfig command to clear the DNS cache. However, Linux and UNIX provide different ways to clear the cache. Linux can run NSCD or BIND or DNSMASQ as the name Service cache daemon. Large or workgroup servers may use

In this article, the relevant program T-DNS to support any host within the LAN to initiate dns id spoofing attacks, so that any website accessed by it is directed to a custom WEB server, such as your personal homepage. You can download this software

Is Ubuntu slow to access the Internet? That's right! Do not doubt that Ubuntu is indeed slower than Windows. Where is the slowness? When you use Firefox to browse the Web page under Ubuntu9.10, you will find that the status bar in the lower left

Today curl , in a Web site encountered a strange problem, the following is the output: [Email protected]:~$ curl-l http://www.yngs.gov.cn/-V* Hostname was wasn't found in DNS cache* Trying 116.52.12.163 ...* Connected to Www.yngs.gov.cn (116.52.1

1. You enter a URL into the browser (enter a URL address)2.The Browser looks up the IP address for the domain name (browser to find IP addresses for domain names)The first step in navigation is to find its IP address by the domain name that is

User Essentials 103 Windows XP Run commandAccessibility OptionsAccess.cplAdd Hardware WizardHdwwiz.cplAdd or Remove ProgramsAppwiz.cplManagement toolsControl AdminToolsAutomatic UpdatesWuaucpl.cplBluetooth File Transfer WizardFsquirt

Run programs & Run command assist Options Access.cplAdd Hardware Wizard Hdwwiz.cplAdd or Remove Programs appwiz.cplManagement Tools Control AdminToolsAutomatic Update w pl.cpl bltooth File Transfer Wizard FsquirtCalculator CalcCertificate Management

In actual application, DNS resolution errors may occur, that is, when we access a domain name, it cannot be resolved to an IP address, however, you can directly enter the website IP address for normal access, which is caused by a DNS resolution