Explain about security of the Ajax based web applications?

As per majority programmers .NET is the best one which have single vendor compare to, the ease of use, more use friendly, you can send any problem ,it'll be solved. (More...)

The ScriptManager control can be used to define the UI or custom UI cultures that you would use in your applications. You can set the
EnableScriptLocalization and EnableScriptGlobalization properties of
the ScriptManager control to true and specify the script reference path as per your requirements. (More...)

Dynamically created pages created by ajax does not support back button which takes the user to the previous pages. There are various solutions to this problem out of which one solution is to use iframes. Also users can bookmark a certain application in its state. User can maintain the applications as the state of the application changes (More...)

In an asynchronous model, all the server side events occur, as they do in a synchronous model. The Microsoft AJAX Library also raises client side events. However when the page is rendered, asynchronous postback renders only the contents of the update panel, where as in a synchronous postback, the entire page is recreated and sent back to the browser. (More...)

JavaScript and HTTP requests. (More...)

browser- and platform-independent. (More...)

Code security is the approach of using permissions and permission sets for a given code to run. Role-based security most of the time involves the code running with the privileges of the current user. Both are equally better. Depending on the deployment type security can be implemented. (More...)

You would need to install 'ASP.NET AJAX Extensions' on your server. If you are using the ASP.NET AJAX Control toolkit, then you would also need to add the AjaxControlToolkit.dll in the /Bin folder.
(More...)

Code security is the approach of using permissions and permission sets for a given code to run. The admin, for example, can disable running executables off the Internet or restrict access to corporate database to only few applications.

Role security most of the time involves the code running with the privileges of the current user. This way the code cannot supposedly do more harm than mess up a single user account.

Neither is better. It depends on the nature of the application; both code-based and role-based security could be implemented to an extent.
(More...)

A virtual entity is used that is referred to as a proxy, due to label in PowerShell. (More...)