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Personal Computers and the Internet

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Personal Computers on the Internet
The differences between Internet and Network Connections A PC makes a direct connection to a network by way of a network adapter, which might be a network port embedded on the motherboard or a network interface card (NIC). The adapter might also be an external device connecting to the PC using a USB port, SCSI external port, or a serial port. The adapter might provide a port for a network cable or an antenna for a wireless connection. (Andrews, Ph.D, n.d.). Local Area Network (LAN) is an example of a network connection. This covers a local area such as a home, office, or other building or a small group of buildings. The Ethenet is the most popular network architecture used today. The three variations of Ethernet are primarily distinquished from one another by speed. A single computer or local network connects to the Internet by way of an Internet service provider (ISP) using one of the following bandwidth technologies:
• Regular telephone lines. The most common and least expensive way to connect to an ISP, requires an internal or external modem.
• Cable modem. Just as with cable TV, cable modems are always connected. Cable modem is an example of broadband media. Broadband refers to any type of networking medium that carries more than one type of transmission. With a cable modem, the TV signal to your television and the data signals to your PC share the same cable.
• DSL (Digital Subscriber Line) is a group of broadband technologies that covers a wide range of speeds. DSL uses ordinary copper phone lines and a range of frequencies on the copper wire that are not used by voice, making it possible for you to use the computer and the phone at the same time.
• ISDN (Intergrated Services Digital Network) is accessed by a dial-up connection. For home use, an ISDN line is fully digital and consists of two channels, or phone circuits, on a single pair of wires called B channels, and slower channel used for control signals, called a D channel.
• Satellite access. This is offered pretty much everywhere. Technology is being developed to use satellites to offer Internet access on commercial airlines. A satellite dish is mounted on top of your house or office building communicates with a satellite used by an ISP offering the satellite service.
• Wireless access. This refers to several technologies and systems that don’t use cables for communication. Wireless is an important technology for mobile devices and for Internet access in remote locations where other methods are not an option.
Steps to connect a workstation to the Internet
Setting up a DSL connection to the Internet:
1. Connect the P/C to the cable modem or DSL box. Connect the cable modem to the TV jack or the DSL box to the phone line. Plug up the power and turn on the broadband device.
2. Configure the TCP/IP settings for the connection to the ISP.
3. Test the connection by using a browser to surf the Web.
Cable modem installation to the Internet:
1. Select the TV wall jack that will be used to connect your cable modem.
2. Using coaxial cable, connect the cable modem to the TV wall jack. Plug in the power cord to the cable modem.
3. When using a network port on your PC, connect one end of the network cable to the network port on the PC and the other end to the network port on the cable modem.
4. You’re now ready to configure Windows for the connection. Right-click My Network Places and select Properties from the shortcut menu. The Network Connections window opens. Click Create a new connection.
5. The New Connection Wizard opens. Click Next to skip the welcome screen. On the next screen select Connect to the Internet and click Next.
6. On the next screen, select Set up my connection manually and click Next. On the following screen select Connect using a broadband connection that is always on and then click Next and then Finish.
Potential problems and solutions when connecting an operation system to the Internet
Connecting to the Internet you can face problems with hackers, viruses, worms, and potential theft. The most important thing is knowing how to protect your computer. The three most important things you can do to protect your computer are to:
 Keep Windows updates current so that security patches are installed as soon as they are available.
 Use a software or hardware firewall.
 Run Antivirus software and keep it current.

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