题目内容

51.A _____ consists of one line of information for every visitor to a Web site and is usually stored on a Web server.

A.Web log
B.firewall
C.cookie
D.copyright

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52.A _____ records information about you during a Web surfing session such as what Web sites you visited, how long you were there, what ads you looked at, and what you bought.

A.copyright
B.key logger
C.firewall
D.clickstream

57._____ are types of hackers who break into other people's computer systems and may just look around. They may steal credit card numbers or destroy information, or otherwise do damage.

A.Zombies
B.White-hat hackers
C.Black-hat hackers
D.Drones

60.A(n) ______ is hardware and/or software that protects a computer or a network from intruders.

A.Web log
B.worm
C.firewall
D.public key

如果系统在始末两个平衡态之间经历的过程是无限缓慢的，则系统所经历的每一个中间状态都可以近似地看成是平衡态，我们将此变化过程称为过程。