Welcome to our Admin Know-IT-All Quiz!
Mr. Know-IT-All invites you to twist your melon with this question, and then visit the list of related information you'll find on the answer page. Make sure you take full advantage of our IT inquisition, and if you're feeling clever after acing all ten quizes, send Mr. Know-IT-All your suggestions for future questions.
This is a network device, usually at a telephone company central office, that receives signals from multiple customer DSL connections and puts the signals on a high-speed backbone line:
d. Yellow Submarine
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