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Across
  1. 1. sending or receiving information, such as telephone lines or computers
  2. 4. a point in a network or diagram at which lines or pathways intersect or branch
  3. 5. a high-capacity transmission technique using a wide range of frequencies
  4. 7. a desktop computer terminal, typically networked and more powerful than a personal computer
  5. 9. a signal that has a very narrow frequency range
  6. 10. protect (a network or system) from unauthorized access
Down
  1. 2. a type of cable that has an inner conductor surrounded by a tubular insulating layer
  2. 3. a group or system of interconnected people or things
  3. 6. a range of frequencies within a given band, in particular that used for transmitting a signal
  4. 8. a proprietary suite of networking protocols developed by Apple Inc. for their Macintosh computers