Bad file request
Problem: Your web browser may not be able to decipher the online form you want to access. There may also be a technical error in the form.
Solution: Consider sending a message to the site's webmaster, providing any technical information you can, such as the browser and version you use.
Connection refused by host
Problem: You don't have permission to access the page or your password is incorrect.
Solution: Try typing your password again if you think you should have access.
Failed DNS lookup
Problem: DNS stands for the Domain Name System, which is the system that looks up the name of a website, finds a corresponding number (similar to a phone number), then directs your request to the appropriate web server on the Internet. When the lookup fails, the host server can't be located.
Solution: Try clicking on the Reload or Refresh button on your browser toolbar. If this doesn't work, check the address and enter it again. If all else fails, try again later.
File contains no data
Problem: The site has no web pages on it.
Solution: Check the address and enter it again. If you get the same error message, try again later.
Host unavailable
Problem: The web server is down.
Solution: Try clicking on the Reload or Refresh button. If this doesn't work, try again later.
Host unknown
Problem: The web server is down, the site may have moved, or you've been disconnected from the Net.
Solution: Try clicking on the Reload or Refresh button and check to see that you are still online. If this fails, try using a search engine to find the site. It may have a new address.
Network connection refused by the server
Problem: The web server is busy.
Solution: Try again in a while.
Unable to locate host
Problem: The web server is down or you've been disconnected from the Net.
Solution: Try clicking on the Reload or Refresh button and check to see that you are still online.
Unable to locate server
Problem: The web server is out-of-business or you may have entered the address incorrectly.
Solution: Check the address and try typing it again.
帮帮忙。。。我加分!!