[单选题]IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP地址所在子网的子网号为()
正确答案 :B
192.168.80.64
[单选题]交换机工作在OSI七层模型的哪一层()
正确答案 :B
数据链路层
[单选题]路由器上“水平分割”的功能是:()
正确答案 :B
阻止路由环路
[多选题]Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? (Select two answer choices.)
正确答案 :BD
Half-duplex Ethernet uses a loopback circuit to detect collisions.
Full-duplex Ethernet makes use of two pairs of wires for data.
解析:解析:Explanation:
[单选题]下列命令中,无法正确执行的是()
正确答案 :A
Router(config)show run
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