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Without proper safeguards, every part of a network is vulnerable to a security breach or unauthorized activity from (1), competitors, or even employees. Many of the organizations that manage their own (2) network security and use the Internet for more than just sending/receiving e-mails experience a network (3)— and more than half of these companies do not even know they were attacked. Smaller (4) are often complacent, having gained a false sense of security. They usually react to the last v
第57题: 通过交换机连接的一组工作站 ( ) 。
A、组成一个冲突域,但不是一个广播域
B、组成一个广播域,但不是一个冲突域
C、既是一个冲突域,又是一个广播域
D、既不是冲突域,也不是广播域
第16题:
若信息码字为11100011,生成多项式 G(X)=X5+X4+X+1,则计算出的 CRC 校验码为 ( ) 。
A、01101
B、11010
C、001101
D、0011010