【名词&注释】
交换机(switch)
[判断题]网络主机活动扫描最常见的方法是使用ICMPEcho方式扫描。()
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举一反三：
[单选题]●In general,atypical (71) model is composed of several phases, such as requirements analysis phase, generaUdetailed design phase, implementation phase, system acceptance testing phase.(71)
A. waterfall
B. incremental
C. spiral
D. prototyping
[单选题]The prototyping method is a dynamic design processs, which requires people who use prototyping method to have the following capability of(66).
A. Proficient program expertise
B. immediately acquire requirement
C. coordinate & organize eloquently
D. handle tools smartly
[单选题]交换机的所有端口在缺省配置的情况下(52)。如果属于同一VLAN的数据帧是连接在不同交换机上的，必须通过(53)传输。
A. 处于直通状态
B. 属于同一VLAN
C. 属于不同VLAN
D. 地址都相同
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