Firewall

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Firewall may refer to:

  • Firewall (computing), a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts
  • Firewall (construction), a barrier inside a building, designed to limit the spread of fire, heat and structural collapse
  • Firewall (engine), the part of a vehicle that separates the engine compartment from the rest of the vehicle
  • Firewall (physics), a hypothetical phenomenon where a freely falling observer spontaneously burns up at the horizon of a black hole

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