Introduction to Networking in Visual Studio .NET

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Introduction to Networking
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Employees can use broadband networks for video conferencing, and to make it easier to telecommute. High bandwidth makes it less time-consuming to download or view entertainment.
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Broadband Internet connections are typically capable of transmitting at a speed of 512 Kbps or more.
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How Does Broadband Work
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Broadband Internet access makes the data processing capabilities necessary to use the Internet available through one of several high-speed transmission technologies. These data processing capabilities are digital in nature, meaning that they compress vast amounts of voice, video, and data information, which are broken down into what are called bits. These bits become words, pictures, etc., on your computer screen. The transmission technologies that make high-speed Internet access possible move these bits much more quickly than do traditional telephone or wireless connections.
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Comparing Broadband Solutions
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As you ve probably figured out by now, a regular dial-up modem is a pretty slow way to connect to the Internet and broadband is more desirable. Unfortunately, it s neither as simple to get connected as it should be, nor as cheap as we would like. There are now a number of options and alternatives for getting connected, all of them offering different speeds and at different prices. The following table presents information to help you choose the best broadband solution for your needs.
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Broadband solution xDSL Max download Speed 8 Mbps Max upload speed 1 Mbps Pros Cons
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Uses existing phone line Widely available Doesn t need phone lines
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May be expensive
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Cable
30 Mbps
30 Mbps
Shared bandwidth Limited availability
Introduction to Networking
Broadband solution ISDN
Max download Speed 64 Kbps
Max upload speed 64 Kbps
Pros
Cons
Uses existing phone line Widely available Emerging technology
Variable pricing models Limited speed
Radio/ Microwave
2 Mbps
2 Mbps
Needs line of sight Limited speed Currently has limited coverage Needs phone line One way transmission need a separate modem to upload. Not suitable for gaming
Satellite
3 Mbps
56 Kbps
Good speed Good coverage
Using Wireless Networking
The increased use of laptop computers and Tablet PCs within corporations, small businesses, and even for personal use, and the increased mobility of people using these devices, has fueled the demand for wireless networks. Until recently, wireless technology was a patchwork of incompatible systems from a variety of vendors. The technology was slow and expensive. With the maturing of industry standards and the deployment of lightweight wireless networking hardware across a broad market section, wireless technology has come of age. Wireless networking is a way to connect computers or other devices, either in your home or across long distances, using infrared light or radio frequency signals. There are two types of wireless networks: Infrastructure network. A local area network that uses access points to connect computers and devices on the network. Ad hoc network. A computer-to-computer local area network with several users in a limited area, such as a conference room.
Standards for wireless (802.11x) networks, also known as Wireless Local Area Networks (WLANs) or wireless LANs, are based on the original Ethernet design. WLANs operate
Introduction to Networking
in unlicensed frequency spectrums and thus are prey to performance lapses and security problems. For example: Anything with high water content would absorb 2.4-GHz radio frequency energy and decrease performance. A room containing stacks of papers can have transmission shadows or dead spots, which would make connections unavailable in certain areas of the room. Microwave ovens, cordless phones, and satellite systems can affect performance by competing for frequency access.
At the time of publishing this book, most WLANs are confined to small areas (about 500 feet), but various standardization committees are discussing additional wireless standards.
Important
Even considering those drawbacks, WLANs are very useful in a variety of situations. For example, if you travel with a mobile computer, you can connect to the Internet through wireless access points installed in airports, hotels, coffee shops, libraries, and other public locations. You can also synchronize data and transfer files between two computers or between a computer and another device, such as a cell phone or a personal digital assistant (PDA).
Wireless Networking Pros and Cons
With a growing demand for easier and faster access to networks and the Internet, many people have added wireless capabilities also known as Wi-Fi to their broadband service. Although the potential for such 802.11-configured tools are almost limitless, people have begun to realize that the advantages unfortunately do come with some setbacks, as well. The main advantages of wireless networking are:
Mobility. You can move about freely and still remain connected to your network and to the Internet. Easy installation. The required network infrastructure, such as base stations and antennas, can be installed and configured almost anywhere, including places too difficult to set up wired networks. Flexibility. Wireless networks easily scale to accommodate more users. Adding new users and/or computers to this type of network is also very simple and quick. Troubleshooting. Problems can be more easily and quickly identified they either exist at the end-user s station or at the base station (assuming that the high-speed Internet connection is readily available and working properly).
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