Which of the following problems is MOST likely to arise when configuring an IPv6 over IPv4 tunnel?

For which option below would an add-on or plug-in be helpful for extending capabilities?

A) check to see if a Web site has been deleted B) check to see which parts of a Web page might not be working or experiencing high traffic C) check to see if a Web server is off-line D) provide special display for graphics such as PDF files

A help desk is a ________ center

a. Cost b. Profit c. Both d. None of the above