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  2. Troubleshoot a broadband internet connection - AOL Help

    help.aol.com/articles/troubleshooting-a...

    If you don't have broadband, you'll need to try other steps to fix problems with a dial-up internet connection. An active internet connection is required to be able to access all the best that AOL offers. If you're using broadband (cable) internet and you can't connect, try the following troubleshooting steps in the order listed until you get ...

  3. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  4. Web Proxy Auto-Discovery Protocol - Wikipedia

    en.wikipedia.org/wiki/Web_Proxy_Auto-Discovery...

    The Web Proxy Auto-Discovery (WPAD) Protocol is a method used by clients to locate the URL of a configuration file using DHCP and/or DNS discovery methods. Once detection and download of the configuration file is complete, it can be executed to determine the proxy for a specified URL.

  5. Troubleshoot a dial-up connection - AOL Help

    help.aol.com/articles/troubleshooting-a-dial-up...

    Check your physical phone connection - A loose cable or cord can often be the cause of a connection problem. Unplug all phone devices in your home - Unplug all phone devices in your home, then reconnect just the modem. Try to connect online, and if it works, plug in each device one at a time until you find the one causing the problem.

  6. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages

  7. netcat - Wikipedia

    en.wikipedia.org/wiki/Netcat

    netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP.The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts.

  8. DNS zone transfer - Wikipedia

    en.wikipedia.org/wiki/DNS_zone_transfer

    DNS zone transfer, also sometimes known by the inducing DNS query type AXFR, is a type of DNS transaction.It is one of the many mechanisms available for administrators to replicate DNS databases across a set of DNS servers.

  9. Exposed node problem - Wikipedia

    en.wikipedia.org/wiki/Exposed_node_problem

    In wireless networks, the exposed node problem occurs when a node is prevented from sending packets to other nodes because of co-channel interference with a neighboring transmitter. Consider an example of four nodes labeled R1, S1, S2, and R2, where the two receivers (R1, R2) are out of range of each other, yet the two transmitters (S1, S2) in ...