how to dns lookup

Why do you want to improve Web performance?Web performance Golden rule: Only 10%~20% end-user response time is spent on downloading HTML documents, while the rest of the 80%~90% time is spent on the download page component.Web performance has an

1. Content optimization 1) Minimize HTTP requests 1) reduce DNS lookup 2) avoid redirection 3) make Ajax cacheable 4) Delay Load component 5) Preload component 6) Reduce number of DOM elements 7) Reduce the number of IFRAME 8) avoid 4041. Server

Since the birth of the site, response speed/response time has always been the topic of concern, and slow is a site of the killer, just as we think that the four-core and broadband capabilities to solve these problems, Wi-Fi and mobile devices for

Summary:The performance of the front end is important for the user experience of the Web App. Don't assume that your web app is good enough, but there are plenty of things you can do to improve your performance. This article introduces Google and

The first few articles describe the basic sorting algorithm, which is usually a prelude to the lookup operation. This article begins with a basic lookup algorithm.In the introduction of the search algorithm, the first need to understand the symbolic

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

Test_pop3.phpHTMLHEADTITLETestforManuelLemossPHPPOP3classTITLEHEADBODY? Require (pop3.php); $ useruser; $ passwordpasswd; $ apop0; $ pop3_connectionnewpop3_class; $ pop3_connection-hostnamemail.xiaocui.com; if ($ error $

10 configuration items MySQL must adjust from: http://www.opsers.org/server/10-configuration-mysql-mysql-must-adjust-optimization.html Most configurations can be changed using set global at runtime. This is a very convenient method that enables you

& Nbsp; 1. configure DNS # vi/etc/resolv. confnameserver192.168.2.30nameserver192.168.2.32 # vi/etc/host. conf # nslookup192.168.2.32DNS lookup # nettimeSET192.168.2.32 time synchronization, the client synchronizes time with server time  1.

Proftpd installation configuration instance: one proftpd installation configuration instance. Purpose: install and configure a proftpd to meet the following requirements: 1 anonymous access is not allowed. 2. open an account and only have the upload

Record a slow mysql connection The problem is as follows: I started a mysql instance on a machine (61.183.23.23) and activated an account to access it from 127.0.0.1 or 61.183.23.23. However, one problem is that the access speed varies greatly

Configure the parser and create BIND-Linux Enterprise Application-Linux server application information. For more information, see. 1. Configure the parser The parser is configured in the file/etc/resolv. conf. The default parser configuration uses

Introduction to Firebug:net PanelSince There is isn't much user documentation related to Firebug features (and there are a lot what to know about) I had deci Ded to put together several posts about existing features.This was intended as a detailed

one, server-side optimization1 . Add Expires or Cache-control Information Header Some images (banner, logos, etc.) that are often used and do not change frequently, static files (login home page, explanatory documents, etc.) can be set for a long

A collection of best practices and tools for Web front-end optimization published in2013-09-23 19:47| 21,315 Reads | source Googe & yahoo| 118 Comment | author wangguo compilation Web optimization Google Yahoo pagespeedyslowSummary:The

From entering the URL in the browser to loading the page The general meaning is: if there is a cache, it will be displayed directly. Otherwise, find the IP address on the local machine, find the IP address through DNS, and return it to the browser.

The Tracert command is used as a routing tracking and diagnosis utility in both DOS and Unix systems. It sends Internet Control Message Protocol (ICMP) the echo request and the echo response message generate the command line report output for each

Yahoo gives a detailed description of the 34 rules that optimize the loading speed of the website (including the YSlow rule 22), and download the translation of the forwarded ponytail (from the Palanga image). 1. Minimize HTTP requests reduce HTTP

UI performance factors, ui performance factors The maximum number of concurrent connections in the browser is generally between 4 and 6. First, we need to know the factors that affect the loading performance: (1) The downloaded file is too large. (2)

English Original: http://developer.yahoo.com/performance/rules.htmlChinese Original: http://www.ha97.com/2710.html1. Minimize the number of HTTP requests 80% of the end-user response time is used to download the content. This part of the time