Question

DQ2. DOM event handling is one of the areas where different browsers have the least compatibility. This is due to the different even models implemented. The W3C has an even model which is not implemented in IE and is different to the two other major models. Discuss these event models, and what you see as the major effects this would have on trying to write consistent Web applications for various platforms. DQ3. With the amount of data being submitted and retrieved from web sites, security has become quite an issue. Web designers and security experts are forced to go to extraordinary lengths to secure data. For instance public and private Key encryption standards are very rigorous. Yet is the expenditure on encryption standards really necessary. Is it the data in transit” which is most at risk of the possible piracy we hear about, or are we too paranoid. Perhaps the vulnerability lies elsewhere?

Answer 1

1)

Browser compatibility issue is a very large issue faced by web developers. Event handling makes our script more interactive and can perform various actions. But it has browser compatibility issue. The DOM of modern web browsers such as IE5+, NS6+, and Firefox provide expanded methods and flexibility (relative to older browsers) for capturing events. So, we must be careful before using the event handler in javascript.

2)

The main vulnerability of websites lies in its database. Every hackers tries to hack data. So, sql is the most vulnerable part of websites. It holds a lot of data and if breached, a lot of security issue arises. A huge question is asked if your data is not secured. It must have confidentiality,integrity and availability. Kali linux and other hacking platforms have sql injection tools to breach data. Once the sql is accessed, the control of data is gone. They can modify, leak and do whatever they want. So, its very important to keep data safe.