Firewall

(noun.) (colloquial) the application of maximum thrust; 'he moved the throttle to the firewall'.

(noun.) a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle.

(noun.) (computing) a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet.

整理:鲁道夫