If a computer is unable to configure a valid Internet Protocol address, it can't connect to a network. If you plug a laptop directly into a modem with an Ethernet cable and receive a "No Valid IP ...

If the Windows Network Diagnostics report displays the message The connection between your access point, router, or cable modem and the Internet is broken after you run the Internet Connections ...

Those of us with separate modems and routers (some Internet connections have the two functions combined into a single device) are likely to focus on the router and ignore the modem. But, like a router ...

If your router pings the modem, but you still have connectivity problems, you may have a faulty Winsock catalog, a corrupt DNS cache or IP conflicts. To troubleshoot a malfunctioning router, you must ...