Computer Science

Q. Define the terms internet, intranet and extranet

Internet:
The Internet, an umbrella term covering countless network and services that comprise a super-network, is a global network of computer networks that was initiated in the 1960’s by a team of scientists under a US government research contract. The Internet now provides access EC transactions to millions of consumers and businesses.

Intranet :
An Intranet is a type of information system that facilitates communication within the organizations among widely dispersed departments, divisions, and regional locations. Intranets connect people together with Internet technology, using Web Browsers, Web Servers, and Data Warehouses in a single view. With an intranet, access to all information, applications, and data can be made available through the same browser. The objective is to organize each individual’s desktop with minimal cost, time and effort to be more productive, cost-efficient, timely and competitive.

Extranet :
Extranet is Extension of an Intranet that makes the latter accessible to outside companies or individuals with or without an intranet. It is also defined as a collaborative Internet connection with other companies and business partners. Parts of the Intranet are made available to the customers or business partners for specific applications. The Extranet is thus an extended Intranet, which isolates business communication from the Internet through secure solutions. Extranets provide the privacy and security of an Intranet while the global reach of the Internet.

Q. What is Hypertext vs Hypermedia

Hypertext is basically the same as regular text - it can be stored, read, searched, or edited - with an important exception: hypertext contains connections within the text to other documents.

Hypermedia documents contain links not only to other pieces of text, but also to other forms of media - sounds, images, and movies. Images themselves can be selected to link to sounds or documents. Here are some World Wide Web is an open hypermedia system.

Q.  What do you understand by WWW? What is the use of hypertext links in Internet access?

WWW: The World Wide is an architectural framework for accessing linked documents spread out over thousands of machines all over the world. It is basically a client server system. Technically it refers to the Hypertext servers that allow text, graphics & sound files to be mixed together. Loosely it refers to all type of resources that can be accessed.

Use of Hypertext links in Internet access
From the user’s point of view, the Web consists of a vast, worldwide collection of documents i.e pages. Each page may contain links (pointers) to other related pages, anywhere in the world. Users can follow a link, which then takes them to the page pointed to. This process can be repeated indefinitely. Pages that point to other pages use Hypertext.

Hypertext is any text that cross-references other textual information with hyperlinks. As all the text in the web is linked through hyperlinks it is of utmost usage for Internet access.

Q. Four types of Consumer Oriented applications in E-Commerce are as follows:

1. B2C (business-to-customer)
"Electronic commerce" is generally understood mostly as selling goods or services to people ("final consumers"). This is not, so far, the biggest part of online business.

2. B2B (business-to-business)
The consensus is universal: this is the priority;. this is where the money is. It’s quite true; so far the bulk of online business is in company-to-company transactions.

3. C2C (customer-to-customer)
Person-to-person transactions are the oldest form of e-business. They’ve been there from the beginning, long before there was any widespread use of the Internet. They continue to be all over the place, quite invisible to anyone thinking that all business is on a website.

4. C2B (customer-to-business)
The most important activity in e-commerce isn’t selling. It’s buying. Quite often that doesn’t mean buying online but checking, comparing, analyzing quality and price before baying in traditional stores or services.