题目内容
A computer virus is a computer program that is created to make and spread copies of itself.
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There is free firewall software available that can run on minimal hardware and provide a good level of protection to your network.
A WAN is a network that connects LANs and nodes across a wide geographical area.
WWW provides access to a variety of Internet resources from different interfaces.
The chief responsibility of TCP/IP is to ensure reliable point-to-point connectivity.
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