Here is the full story published by BBC

http://www.bbc.co.uk/news/technology-13260039

An Intranet is an Internet-software-based network inside an organization that links its communications and information in a way that makes information more accessible and navigation through all the resources and applications of the organization’s computing environment more seamless.

Security is a key Intranet concern and is most typically achieved by placing the Intranet network applications on the organization’s wide area network (WAN) and by limiting access to the WAN.

An Extranet is an Internet-software-based network designed for proprietary communication with specific customers or business partners. An Extranet network allows organizations to communicate more efficiently with their strategic constituents and make technical or product support, exclusive pricing, or other forms of privileged information accessible online. As with Intranet networks, security is a concern, but limiting the Extranet network to an organization’s WAN is typically not an option. Therefore, alternative security measures must be adapted to the specifics of the network.

While the different and discrete features of these three networks may be worth noting, it is more important to recognize that the inherent technical and practical efficiency of open-architecture connectivity is blurring these distinctions. When an organization’s Intranet or Extranet network can be accessed via the Web by a user who has appropriate security clearance, as is now often the case, network definitions become obsolete, and the central issues of business value and communications functionality become more important.

Does the blurring of these network concepts represent increased efficiency and offer increased business opportunities, or does it simply serve to further complicate matters? The distinctions made between these networks were artificial, or at least temporary, in the first place. And attempting to conceptually separate and disconnect networks that are predicated upon inherent connectivity is self-defeating. Therefore, rather than focusing upon the differences between Intranets, Extranets, and the Internet, it is wise to identify the logical connections and commonalities between these networks and apply them to practical needs.

The central value of Internet-based communications technologies is that they all use the same languages, standards, and protocols. Not only does this agreement on language, standards, and protocols lead to open communications, but the common languages used also can be advanced simultaneously by multiple competing organizations to the benefit of all.

For example, in order to advance applications in a proprietary system environment, the system sponsor must independently invest in software development. Advancing applications in an open-architecture environment, on the other hand, occurs through competition and synergy. It is hard to believe that any of the major healthcare information system vendors could bring as much programming capability to bear on improving their proprietary user interfaces as Microsoft and Netscape are applying to advance the open-system user interface commonly known as the Internet browser.

What types of real-life business problems can an open-architecture network address? Whether classified as Web sites, Intranets, or Extranets, the potential value these networks offer to organizations is the same and can be broken down into three categories:

Improved data access. Examples might include improved physician and hospital access to clinical data, financial data, and legacy systems designed to interface with existing inpatient systems.

Business processes online. Business processes that traditionally have been performed by phone and fax can be accomplished more efficiently in an online format. Examples include online medical authorization and referrals and supply order placement and confirmation.

Data collection. With business processes trafficking a network, data collection can be accomplished by using relevant, specific databases maintained by the organization. Healthcare organizations can, thus, have real-time access to data that previously was lost in a paper system of forms, faxes, and printed reports. Collecting and analyzing these data allows healthcare organizations to make strategic and tactical decisions based on accurate and timely information – a rare and powerful advantage.

The term client-server refers to a popular model for computer networking that utilizes client and server devices each designed for specific purposes. The client-server model can be used on the Internet as well as local area networks (LANs). Examples of client-server systems on the Internet include Web browsers and Web servers, FTP clients and servers, and DNS.Client and Server Devices

Client/server networking grew in popularity many years ago as personal computers (PCs) became the common alternative to older mainframe computers. Client devices are typically PCs with network software applications installed that request and receive information over the network. Mobile devices as well as desktop computers can both function as clients.A server device typically stores files and databases including more complex applications like Web sites. Server devices often feature higher-powered central processors, more memory, and larger disk drives than clients.

Client-Server Applications

The client-server model distinguishes between applications as well as devices. Network clients make requests to a server by sending messages, and servers respond to their clients by acting on each request and returning results. One server generally supports numerous clients, and multiple servers can be networked together in a pool to handle the increased processing load as the number of clients grows.A client computer and a server computer are usually two separate devices, each customized for their designed purpose. For example, a Web client works best with a large screen display, while a Web server does not need any display at all and can be located anywhere in the world. However, in some cases a given device can function both as a client and a server for the same application. Likewise, a device that is a server for one application can simultaneously act as a client to other servers, for different applications.
Some of the most popular applications on the Internet follow the client-server model including email, FTP and Web services. Each of these clients features a user interface (either graphic- or text-based) and a client application that allows the user to connect to servers. In the case of email and FTP, users enter a computer name (or sometimes an IP address) into the interface to set up connections to the server.

Local Client-Server Networks

Many home networks utilize client-server systems without even realizing it. Broadband routers, for example, contain DHCP servers that provide IP addresses to the home computers (DHCP clients). Other types of network servers found in home include print servers and backup servers.Client-Server vs Peer-to-Peer and Other Models
The client-server model was originally developed to allow more users to share access to database applications. Compared to the mainframe approach, client-server offers improved scalability because connections can be made as needed rather than being fixed. The client-server model also supports modular applications that can make the job of creating software easier. In so-called “two-tier” and “three-tier” types of client-server systems, software applications are separated into modular pieces, and each piece is installed on clients or servers specialized for that subsystem.Client-server is just one approach to managing network applications The primary alternative, peer-to-peer networking, models all devices as having equivalent capability rather than specialized client or server roles. Compared to client-server, peer to peer networks offer some advantages such as more flexibility in growing the system to handle large number of clients. Client-server networks generally offer advantages in keeping data secure.

It’s like a plague growing across the world, signs of its growth are seen everywhere. The Internet was started as an experiment to test networks to try and develop a network that could survive a nuclear attack. While the net has never needed to survive a nuclear blast its design has proven again and again how robust it is. It has with stood many an attack from construction, people digging up cables, to lightning blowing up a router. The network has always recovered and bypassed the problem.

The Internet began as the Advanced Research Projects Agency Network (ARPANET) during the cold war in 1969. It was developed by the US Department of Defense’s (DOD) research people in conjunction with a number of military contractors and universities to explore the possibility of a communication network that could survive a nuclear attack. It continued simply because the DOD, DOD’s contractors, and the universities found that it provided a very convenient way to communicate.

The ARPANET was a success from the very beginning. Although originally designed to allow scientists to share data and access remote computers, e-mail quickly becomes the most popular application. The ARPANET became a high-speed digital post-office as people used it to collaborate on research projects and discuss topics of various interests. By 1971 the ARPANET grew to 23 hosts connecting universities and government research centers around the country.

In 1973 the first international connections were made with England and Norway. Growth continued at a steady pace, by 1987 there were over 10,000 hosts, then by 1989 it had exploded to 100,000.

Bob Kahn and Vint Cerf are key members of a team, which created Transmission Control Protocol / Internet Protocol (TCP/IP), the common language of all Internet computers. For the first time the loose collection of networks which made up the ARPANET is seen as an Internet, and the Internet as we know it today is born. The mid-80s marks a boom in the personal computer and super-minicomputer industries. The combination of inexpensive desktop machines and powerful, network-ready servers allows many companies to join the Internet for the first time. Corporations begin to use the Internet to communicate with each other and with their customer’s.

The general public gets its first vague hint of how networked computers can be used in daily life as the commercial version of the ARPANET goes online. By 1988 the Internet is an essential tool for communications, however it also begins to create concerns about privacy and security in the digital world. New words, such as hacker, cracker and electronic break-in, are created.

These new worries are dramatically demonstrated on Nov. 1, 1988 when a malicious program called the Internet Worm temporarily disables approximately 6,000 of the 60,000 Internet hosts. These concerns lead to the formation of the Computer Emergency Response Team (CERT), located in Pittsburgh, Pennsylvania, to address security.

In the early 90’s the ARPANET was decommissioned and forced to leave, leaving only the vast network of networks the Internet. The number of hosts by now exceeded 300,000.

Today it has grown to over 800′000′000

In 1990, HyperText Markup Language (HTML), a hypertext Internet protocol which could communicate with graphic information on the Internet, was introduced. Each individual could create graphic pages (a Web site), which then became part of a huge, virtual hypertext network called the World Wide Web (WWW). The enhanced Internet was informally renamed the Web and a huge additional audience was created.

As the Internet celebrates its 39th anniversary in 2010, the military strategies that influenced its birth become historical footnotes. Approximately 2 billion people are connected to the Internet. More than $173 billion per year changes hands at Internet shopping malls in US alone. Users in almost 150 countries around the world are now connected to the Internet and the number of computer hosts approaches 800 million.

The Age of the Internet has arrived. Traffic on the Internet expands at a 444.8% annual growth rate. Within 39 years, the Internet has grown from a Cold War concept for controlling the tattered remains of a post-nuclear society to the Information Superhighway. Just as the railroads of the 19th century enabled the Machine Age, and revolutionized the society of the time, the Internet has taken us into the Information Age, and profoundly affects the world in which we live.

No, what we consider ‘development’ is really scripts and templates and WordPress – all great in varying ways but lacking the singular quality a site needs to succeed: uniqueness.

But that is also a word that gets tossed around the lawn like bocce balls because in basic reality, ’unique’ means doing something no one else has even attempted.

So while I do love and see benefit to many things like directories and e-card shops and Amazon stores, true development means going where no man, woman or animal has gone. Means building something that truly stands on its own, builds a base and gains value to the upper echelons.

Because, let’s face it, even a great mini-site is only worth the value of the name behind it (which feeds things like SEO and so forth).

Reaching higher involves much more effort and ingenuity and focus. In modern times, it requires consideration of difficult questions and a hard, straight answer in each is key.
1. Are you the only one?

There are perhaps a million sites giving away free e-cards, do we really need another one? Unless yours is the first 3D card of course.
2. What are the barriers to entry?

If it takes you five minutes to build your site and a couple hundred bucks, that is a warning sign. Boxcar took over 18 months and a tremendous amount of sweat and finance to realize. And yet we have little doubt much will be copied but putting a lot auction platform together is a monumental task that many have already tried and failed. Others will too.
3. Does it rely on ‘free-loaders’?

It is a wonderful thing to create an informational site and watch the traffic grow and hope that AdSense goes up…this week. But the truth is that ‘free’ is dead so if your new fangled idea relies on ‘giveaways’ to sustain itself, you should think again. Something like YouTube or a URL shortnener pops to mind.

Bottom line is your web site must sell something – anything! Even if it is for $0.50. Just make sure you don’t cater to the free-loader from the get -go, better to get fewer but buying visitors. Free-loaders? They are Internet vampires, sucking up our bandwidth.
4. What’s the real cost?

I hear ideas daily from people who have no clue how expensive and time-consuming it might be to set up a video camera in every high-school football stadium (true one). Or the levels of planning and finance that might be involved to make it real.

A friend recently spent $250,000 developing a web site – despite my warnings and although I admit this was a very good, niche idea. But the real cost and devotion was too much or more than they expected and it lasted less than 6 months before being shut down.

Take good inventory of what it might take UPFRONT to get it done and don’t be shy – add a 25% ‘fudge factor.’ And that means money, yes, but perhaps more importantly, it means your time and emotional and physical resources.
5. How far will you take it?

It can mean losing money for years before a profit is seen. Are you truly willing to devote?
6. What’s the end game?

This is where you can witness the differences as a mini-site is meant to increase dying parking revenue while full and true development’s aim is higher – towards an end-sale. And that is what makes #5 so palpable, the feeling that a large payday awaits down the raging river.

If this piece has scared you – good! You should be afraid, very afraid! Like I said, there should be a sign outside the Internet warning people of the risks like those at Space Mountain in Disney.

And I speak from personal failure and loss, no doubt. I have been developing them on a true level since 1997 and have had many bombs but several successes as well. At this point my focus is entirely and solely on that which is ‘new’ and without sibling, like Boxcar and Soundboard.com for instance.

Soundboard is a personal favorite and love – launched in 2007, it is a top 10,000 site that took mountains of resources to build and improve but ultimately became popular, viral and profitable. Now its the largest audio resource on the web – and it’s not even close. There are over 600,000 incoming links to SB. How many does your mini-site have?

Yet that is not to downplay lower-levels of development, it can be quite profitable and far easier – but let’s call it what it is while also warning others of the pits in going further down the path.

Your choice.

But at the very minimum, let’s level the argument and stop bouncing the word ‘development’ around like a beach ball at a Phish concert.

And not just because it helps us all develop better but also because I am fresh out of analogies.

Thus I thought to help you guys and gals out. here is how you get rid of this Torjan horse virus from your PC and pen drive.

First clear your PC and then clear your pen-drive.

start => run => cmd
goto directory c:\windows => c:\cd windows => c:\windows\>
type this – attrib -s -h -r -a autorun.inf
del/f autofrun.inf
goto sytem32 folder => c:\windows\ cd system32 => c:\windows\system32\>
type this – attrib -s -h -r -a explorar.exe
del/f explorar.exe
goto pendriver directory from command prompt
type this – attrib -s -h -r -a autorun.inf
type this – attrib -s -h -r -a *.*

After that open the USB driver ( Do not double click. right click on the Drive=>explore)
Delete the autorun.inf file and unknow exe files in the USB.
Now its complete.
Restart the computer.

There are Only 20 seats are available at the first batch and they will be given in “First come First served” order. The second batch will start in May 2011. For more information call 077 38 676 38 OR contact IIS CITY CAMPUS by phone 222 8060 or 222 2201.

This program will educate you HTML to Search Engine Marketing. All essential languages and tools to master Web Development.

Scheduled start of the program is last week of April. For any further information please contact IIS City Campus by email enquiry@iisCityCampus.com or by phone 222 8060 or 222 2201.

To rehabilitate the city, it is also important to educate and employ the youths from Jaffna. By extending OLPC project to Jaffna, Information Technology can be introduced at root level as the first step of Sri Lanka’s IT hub.

Current knowledge within Jaffna residence is limited. IT educational institution and foreign degree providers are mushrooming in Jaffna to make their best balance sheet ever. The biggest question is How much worth Certificate, Diploma etc provided by these institutions have? Do those students get employed? What is the major concern of this institution is the profit not social responsibility.

There is a big Local market potential for Information Technology. If you have noticed that there is NO web site of any community is up to standard. The Internet could play a big role as to bridge the gab to seek employment far away from local market. Education the youths in IT will prepare for the world market than just local market.

I hope at the least one NGO will come forward to extend OLPC project to Jaffna.

Thank you,