Web Technology Questions

With HTML5, it is possible for the web pages to store the data locally in the user's browser. This web storage is much faster and secured than the cookies. Also, a larger amount of data can be stored without causing any adverse effect to the performance of the website. 

The data here is not included with every server request. It is used ONLY when it is asked for. It is only that particular web page that can access the data stored by itself.

JavaScripts uses a hierarchical structure that applies to the objects in a document. There are some objects that show the relationship of one object to another using the language.

Window object: This is the topmost object in the hierarchy. It represent the content area of browser window that consists of HTML documents. Each frame is also a window that has some actions inside it.

Document object: This object gets loaded in a window and consists of objects of different kind in the model. It consists of the content that will be written in the script.

Form object: Form objects are used for more interaction with the users. It represents the form elements inside <FORM>...</FORM> tag.

- Class selector can be given to an overall block. This is sometimes termed as block element as well, whereas ID selector identifies a unique name and a style for a specific element. 

- ID selector declares the style for only one particular element which can be differentiated from other element, whereas Class selector is being given for the whole complete block.

There are different types of hosting provided to upload and share their files using the web or Internet. 

- Free web hosting service: It provides limited services and offers it to companies in that it offers advertisements and other services with limitations. 

- Shared web hosting service: where a server shares many websites all placed at one place having the range from few to hundred. 

* The domains are most probably remains shared with a common pool of resources that is based on the server like RAM and CPU.

- Reseller web hosting: This is the web hosting that allows clients to provide web hosting to others. This includes individual domains that are listed using the affiliated with a reseller. 

- Virtual Dedicated Server: This is also known as also known as a Virtual Private Server (VPS). This provided the divided server resources in the virtual servers and the method that doesn’t relate directly to the hardware. 

- Home server: This is a single machine server that can be thought as a personal server that is used to host one or more web sites using the connection.

The web hosting on the server can be accomplished by using the IP based hosting that provides resources and services as follows:

- IP based hosting provides dedicated IPs that consists of virtual hosts and having the different IP address. 

- Web server is configured with different and multiple physical network interfaces using the same physical interface. 

- Web server uses this IP address to connect the client with the server to determine the web site that provides the client a view of it. 

- IP addresses provide the resources that are required in order to use the SSL certificates and other resources rather than shared certificate.

Web server handles client side and server side validations and helps to deliver web content that can be accessed through the Internet protocols.

Examples:

Microsoft IIS (Internet Information Service)

Apache web server from Apache

Java web server

Pramathi web server etc...

Some of the new features provided in HTML5 are:

- It provides support for local storage

- New form controls, like calendar, date, time, email, url, search

- <canvas> element is provided to facilitate 2D drawing

- The <video> and <audio> elements are provided for media playback

- New content-specific elements are provided. For e.g. <article>, <header>, <footer>, <nav>, <section>

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