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Chapter 8. Troubleshooting Your Network ... > Troubleshooting a Broadband Internet...

Troubleshooting a Broadband Internet Connection

Because broadband Internet connections such as cable modems, fixed wireless, DSL, and satellite use either 10/100 Ethernet or USB connections to your computer, connection failures are caused by different problems than those afflicting analog modem Internet connections. Regardless of the type of broadband connection, these problems include the following:

  • Loose or damaged cables— Check the connections between the computer, the modem, and the external signal source; tighten loose cables and replace damaged cables (see Figure 8.14).

    Figure 8.14. Loose (top) and properly connected (bottom) Category 5 Ethernet cables plugged into a typical 10/100 Ethernet card.

  • Disabled or defective USB or 10/100 Ethernet ports— Connect a USB cable to a different USB port; use the Device Manager to determine whether the ports are configured correctly (see “Using Device Manager,” Chapter 2, p. 100, for details). Use any diagnostics software provided with the network adapter to test it.

  • Conflicts between USB or 10/100 Ethernet ports and other hardware devices— See “Using Device Manager,” Chapter 2, p. 100, for details.

  • Incorrect TCP/IP configuration— See “TCP/IP Configuration and Troubleshooting,” this chapter, p. 533, for details.

  • Router failure (a router lets you share a broadband Internet connection among multiple computers)— See “Troubleshooting Routers and Gateways,” this chapter, p. 524, for details.


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