Digital Communications

12345678
Across
  1. 2. a device that enables digital data transmission over analog communication lines such as telephone lines
  2. 4. a network security system that monitors and controls incoming and outgoing network traffic based on pre-defined security rules
  3. 6. a connected network of computers across the globe
  4. 7. a small formatted unit of data that is transmitted across a network
  5. 8. a program that spreads by first infecting files or the system areas of a computer or network routers hard drive and then making copies of itself
Down
  1. 1. a machine that you use to access the internet
  2. 3. any program designed to harm computer systems networks or data
  3. 5. a networking device that directs data packets between computer networks