[单选题] 提问人:匿名网友 提问时间:2021-08-24

CPA-04609Which of the following statements is incorrect for firewalls?


A .Packet filtering is the simplest type of firewall configuration, but it can be circumvented by an intruder who forges an acceptable address (called IP spoofing).
B .A firewall is a system of user identification and authentication that prevents unauthorized users from gaining access to network resources.
C .The term firewall may also be applied to a network node used to improve network traffic and to set up a boundary that prevents traffic from one network segment from crossing over to another.
D .Traditionally, firewalls have been network firewalls that have protected the network as a whole from intrusion by outsiders and invasion by viruses.

提问人:匿名网友 提问时间:2021-08-24

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