Software Testing Curve

As a software developer, you certainly have a high-level picture of how web apps work and what kinds of technologies are involved: the browser, HTTP, HTML, web server, request handlers, and so on. In this article, we will take a deeper look at the sequence of events that take place when you visit a URL. 1. You enter a URL into the browser It all starts here: 2. The browser looks up the IP address for the domain name   The first step in the navigation is to figure out the IP address for the visited domain. The DNS lookup proceeds as follows: Browser cache –  The browser caches DNS records for some time. Interestingly, the OS does not tell the browser the time-to-live for each DNS record, and so the browser caches them for a fixed duration (varies between browsers, 2 – 30 minutes). OS cache  – If the browser cache does not contain the desired record, the browser makes a system call (gethostbyname in Windows). The OS has its own cache. Router cache

Clickjacking Clickjacking  ( User Interface redress attack ,  UI redress attack ,  UI redressing ) is a  malicious technique  of tricking a  Web   user  into clicking on something different from what the user perceives they are clicking on, thus potentially revealing  confidential  information or taking control of their computer while clicking on seemingly innocuous  web pages . It is a  browser security  issue that is a  vulnerability  across a variety of  browsers  and  platforms . A clickjack takes the form of embedded  code  or a script that can execute without the user's knowledge, such as clicking on a  button  that appears to perform another function. [5]  The term "clickjacking" was coined by Jeremiah Grossman and Robert Hansen in 2008. [ citation needed ]  Clickjacking can be understood as an instance of the  confused deputy problem . [6] Contents    [ hide ]  ·          1 Description ·          2 Examples o     2.1 Likejacking o  

Introduction to VBScript This tutorial focuses on: ·          What you should already know ·          What is VBScript? ·          VBScript and Internet Explorer ·          What can be done with VBScript? What you should already know Before studying VBScript, you should already have at least a basic understanding of HTML and/or XHTML. VBScript scripts are placed on webpages with HTML/XHTML tags and without knowing these tags, you will not know where and how to place VBScript scripts on a webpage. Check out our   HTML tutorials   and   XHTML tutorials   if you are not yet familiar with these languages. What is VBScript? VBScript is a scripting language used to provide dynamic and interactive content on webpages. VBScript is short for Visual Basic Scripting Edition. VBScript is a lighter version of the Visual Basic programming language, and like Visual Basic, VBScript was developed by Microsoft. VBScript and Internet Explorer The most important thing to know abo