vb.net generate barcode image The World as It Was in C#

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The World as It Was
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Four or five years ago, the computing world was a different place the Internet was just starting to show its potential as a communications medium and drive inno vation to new levels. Back then, the computing world had some constants you could count on if you were running a business:
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All client PCs were the same. Every PC was pretty much like every other
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PC. Your PC was a box that sat on your desk and had the same parts and and followed the same processes as others of its kind. Even though there were different systems UNIX, Apple, Windows, and so forth for the most
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The Business Case for Virtual Private Networks |
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part the hardware had the same configurations. There were very few sur prises, and IT administrators didn t have to worry about different types of hardware clients and operating system clients on their network.
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Networks were wired.
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If you wanted your computer to talk to another computer, that communication would take place over a modem or hardwired connection. There simply were no other options. Telecommuting was virtually unknown because of lack of connectivity options and bandwidth resources.
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These facts allowed IT administrators to make some base assumptions on how to run their network and what to do to service their users. Remote access options for users were limited and considered to be a luxury that came at a high cost. The only kind of remote access available consisted of expensive in-house modem banks that required dedicated telephone lines and that incurred thousands of dollars a month in communications charges. Most companies considered the Internet to be a toy it was not yet fully developed into the business tool it is today. Most companies did not even bother to provide Internet access for their users. The concept of con stant communication from office to office was virtually unheard of, as e-mail another emerging technology considered to be a luxury required only occasional or once-a-day delivery. Because of the overhead required to support remote access for a company, the concept of a home office and telecommuting were not a reality. Bandwidth con straints over modems made any kind of remote application work unworkable. The concept of remote access was extremely limited and was certainly not an option for most users. It was an option only for executives (who didn t find it very useful) and for IT administrators, who needed to have emergency access to the network to ser vice it.
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The World as It Is Today
Now we jump forward in time to today s computing environment. As is always the story with technology, all the assumptions we made about communications and cli ents in the past are now invalid.
Hundreds of different computing clients available today.
Figure 1-1. The many types of client computers today.
PART I
VPN Technology
We do not know what a computer looks like anymore.
Figure 1-1 shows an entire suite of computer clients powered by Microsoft operating systems. They come in all shapes and sizes. There are hundreds of ways to access your data and services you can have desktops, laptops, Tablet PCs, Pocket PCs, Smartphones, television-based clients, watches, or even comput ing devices specifically designed to handle particular business needs. For instance, some Pocket PCs can withstand arctic cold tempatures or other environmental extremes. It is very difficult to anticipate what type of com puter users will use to access their data.
Multiple connectivity options exist today.
Almost every laptop available can be purchased with optional wireless network communications. Ethernet adapters are a commodity that every laptop and desktop computer has built in by default. (Remember when not too long ago this was an expensive add-on option ) Users now have ready options to communicate over wired, wireless, cellular, or even personal satellite communications. IT administrators have to plan and provide for all of these options.
The world of the IT administrator has changed drastically in recent years the types of client computers and the ways they communicate have increased immensely. Yet administrators still have to provide the same level of service and connectivity for all options and users.
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