In general, a computer network is divided into five types, namely;

1. Local Area Network (LAN)

Local Area Network (LAN) is a privately owned network within a building or campus-sized to several kilometers. LANs are often used to connect personal computers and workstations in a corporate office or factories in order to use shared resources (eg printers) and exchange information.

2. Metropolitan Area Network (MAN)

Metropolitan Area Network (MAN) is basically a LAN version is larger and usually uses the same technology as the LAN. MAN can include corporate offices are adjacent or also a town and can be used for private purposes (private) or public. MAN capable of supporting both voice and data, can even be associated with cable television networks.

3. Wide Area Network (WAN)

Wide Area Network (WAN), the range covers a wide geographical area, often covering a country or even continent. WAN consists of a collection of machines that aim to run the programs (applications) user. Get more about this with COM Express™ basic

4. Internet

Actually there are many networks in this world; often using hardware and software are different. People who are connected to the network often expect to be able to communicate with others who are connected to other networks. Desires such as these require the relationship between networks that are often not compatible and different. Usually to do this required a machine called the gateway to engage and implement the necessary translation, both hardware and software. Collection of interconnected networks is called the Internet.

5. Wireless Networking

Wireless network is a solution to the communication can not be done with the wired network. For example, people who want to get information or communicate despite being on top of a car or airplane, it is absolutely necessary because the cable network without a wired connection may not be made in a car or plane. Currently the networks without wires has been rapidly adopted by making use of satellite services and are able to provide faster access speeds than a wired network.

Internet has grown rapidly and competitively in recent years. No one can predict that the Internet could become a very important technology in the 21st century at 25 years ago. Many people do not recognize the possibilities the Internet can connect people around the world, open the job to anyone and also the coolest entertainment. Speaking about the benefits of the Internet, we can not forget the ability of the Internet to sell and buy products. E-commerce and online shopping became an icon in Internet activities. Now people use the Internet not just to chat and data transfer, or maybe looking for articles and video. They started using the internet to shop online.

When we talk about online shopping, there are two search engines of the products on the internet, the Yahoo Store and Google Product Search. We can easily find relevant products we are looking for with this search engine. It must be difficult for us if we do not have search engines to help us to find websites or online stores on the internet to sell products that look. That’s why Google Product Search and Yahoo Store play the most important for online shoppers.

Yahoo and Google also have an online store so you can sell your products on the internet and you can get more facilities than other Internet users. It is no secret that Google is more popular than Yahoo in everything, so you can increase your income or your online sales with Yahoo products product store to Google Base. Of course not easy for you to apply Yahoo Store to Google, but there are some people or companies offering this service so that you can easily improve your buyer without hassles.

Need an IT outsourcing consultants? What is IT exactly means? Information technology (IT), as defined by the Association of Information Technology of America (ITAA) is “the study, design, development, implementation, support or management of computer information systems, particularly software application and computer hardware. “It deals with the use of computers and software to convert, store, protect, process, transmit and retrieve information. Today, the term “information technology” is often mixed with many aspects of computing and technology, and the term is more recognizable than ever before. Information technology can be quite extensive, covering many fields. IT professionals perform a variety of tasks ranging from installing applications to designing complex computer networks and databases. Some tasks include IT professionals, data management, networking, hardware engineering, software design and databases, as well as administration and management of complete systems. When computer and communications technologies are combined, the result is information technology or “infotech”. Information Technology (IT) is a general term that describes any technology that helps to produce, manipulate, store, communicate, and / or disseminating information. See managed services Dallas

The term “information technology” came about 90 years. Its basic concept, however, can be traced back even further. Throughout the twentieth century, an alliance between the military and various industries has existed in the development of electronics, computers, and information theory. The military has historically led this research by providing motivation and funding for innovation in the field of mechanization and computer. Get the outsourcing network
The first commercial computer was the UNIVAC I. It was designed by John Presper Eckert and John William Mauchly office for U.S. Census In the ’70s saw the rise of microcomputers, followed closely by IBM’s personal computer in 1981. Since then, four generations of computers have been developed. Each generation represented a step that was characterized by hardware of decreased size and increased capabilities. The first generation used vacuum tubes, integrated circuits second transistors, and third parties. The fourth (and current) generation uses more complex systems such as Very-large-scale integration or System-on-a-chip.

In a little over a decade, the Internet has grown from an interesting distraction into an essential part of our lives.

Mobile broadband services let users like reality star Kimberly Stewart keep track of e-mail while on the go.

We can’t go more than an hour without checking e-mail. When we have a question or need more information (about anything), we pop open a Web browser and start Googling. At work, it’s all about videoconferencing, the corporate Intranet and online CRM tools. At home, it’s all about Limewire, YouTube and updating our Facebook page.

The ideal way to access all of these tools and resources is with a broadband (high-speed) Internet connection, something we’ve come to expect at home and at the office. According to 2007 statistics, 70 percent of adult Internet users have broadband at home [source: Pew Internet & American Life Project].

What about when we’re on the move? Surveys show that we still have the same hunger for Internet-based information, communication and entertainment. According to a 2008 report by the Pew Internet & American Life Project, 58 percent of all Americans have used a cell phone or PDA for “non-voice data activities” like sending an e-mail or or recording a video. And 41 percent of all Americans have used a WiFi-enabled laptop computer or other mobile device to access the Internet away from the home or office [source: Pew Internet & American Life Project].

Until recently, there have only been a few options for mobile access to the Internet:

• If you have a WiFi-enabled laptop computer or handheld device, you could check e-mail or surf the Web at free WiFi hotspots in places like airports, coffee shops, bookstores and some downtown areas.
• You could use a WAP (Wireless Application Protocol)-enabled cell phone. WAP is the universal standard for applications using wireless communications.
  
• You could buy a BlackBerry, iPhone or other smartphone to surf special WAP Web sites. But surfing speeds are slow and the Web sites are simple (no video, audio or cool graphics) to access e-mail and the Internet at higher speeds.

Now several major national cell-phone carriers have introduced technology that brings DSL-quality speed to any mobile device within range of a cellular signal, including laptop computers. Some even get bling decal kits for their gadgets.

Mobile Broadband Technology

Mobile broadband is powered by the same technology that makes cell phones work. It’s all about radio waves and frequencies. Cell phones and cell-phone radio towers send packets of digital information back and forth to each other via radio waves. In the case of a phone call, the packets of information carry voice data. For mobile broadband, the packets of information would be other types of data like e-mails, Web pages, music files and streaming video.

With mobile broadband, computer users can surf the Internet and check e-mail from any location, including outside.

There are two basic technologies used to operate cell-phone networks: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). GSM is more popular in Europe and Asia and CDMA is more common in the United States. The major technical differences between the two systems have to do with the way each technology shares space on the radio spectrum. Without getting into the details, both GSM and CDMA use different algorithms that allow multiple cell phone users to share the same radio frequency without interfering with each other.

Mobile broadband is also known as 3G, or third-generation cell-phone technology. Both GSM and CDMA have developed their own 3G technology solutions for delivering high-speed Internet access to mobile devices.

The CDMA-based mobile broadband technology is called EV-DO (Evolution-Data Optimized or Evolution-Data Only). The trick behind EV-DO is that it runs over a part of the cellular network devoted entirely to data. Voice calls require a lot of bandwidth to maintain sound quality. By separating the data channel from the voice channel, the network can maximize data transfers and provide higher-speed access to e-mail, the Internet and multimedia. The downside is that you can’t access the Internet and other data tools when talking on your cell phone. EV-DO advertises average speeds of 300-400 Kbps (kilobytes per second), the equivalent of DSL.

To use an EV-DO network, you need to either have a device that’s already loaded with EV-DO hardware (like a BlackBerry or other smartphone) or a special network card that plugs into your laptop. These network cards connect via USB ports or other standard PC card slots and act as antennas for mobile broadband signals. For the fastest download and upload speeds, you need to be within range of the EV-DO cellular signal. Otherwise, you’ll be bumped down to the 1xRTT (Radio Transfer Technology) standard, which broadcasts at speeds between 60 and 100Kbps.

GSM’s answer to EV-DO is something called HSDPA (High-Speed Downlink Packet Access). Unlike EV-DO, an HSDPA network can handle both voice and data transfers, so you can talk to mom and surf the Web at the same time. It maximizes data transfer speeds by focusing on downloading information, not uploading. HSDPA advertises average download speeds between 400 to 700 Kbps.

Like EV-DO, you’ll need special network hardware to access HSDPA mobile broadband. You either need a device with a built-in HSDPA card or a special PC card that plugs into a laptop computer. You’ll also need to be within range of an HSDPA signal, which is concentrated in metropolitan city centers and along major highways.

Now let’s look at some of the features of mobile broadband service as offered by the large cell-phone providers in the United States. For easy buying we can use payday loan