[多选题]属于私有IP段的是()
正确答案 ：ABD
10.0.0.0-10.255.255.255
172.16.0.0-172.31.255.255
192.168.0.0-192.168.255.255
解析：ABD
[单选题]You are a senior network administrator at Ezonexam, and while performing the password recovery procedure on your 2500 series Cisco router, you type in the following command:o/r 0x2142
正确答案 ：C
It is used to bypass the configuration in NVRAM.
解析：解析：Explanation:
[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]Ezonexam has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
正确答案 ：B
VTP will allow switches to share VLAN configuration information
[单选题]You are an administrator of the Ezonexam switched network and your goal is to reduce some of the administrative overhead on your network. You plan on achieving this by configuring a new VLAN for each department in the Ezonexam network.However, you need to share the VLAN information across numerous switches. Which of the following would allow you accomplish this?
正确答案 ：D
VTP
解析：D 解析：Explanation:
[单选题]路由器上，清空路由表的命令是（）
正确答案 ：D
clearip route*
[单选题]How can a Ezonexam administrator determine if a router has been configured when it is first powered up?
正确答案 ：C
An un configured router goes into the setup dialog
解析：解析：Explanation:
[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP和掩码结合，共划分了多少个子网（不包括全0子网和全1子网）（）
正确答案 ：B
30
[单选题]On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hosts do? (Select all valid answers)
正确答案 ：C
The hosts will attempt to resume transmission after a time delay has expired.
解析：C 解析：Explanation:
[单选题]路由器上，命令“show int s0”的显示结果为：Serial0 is up,line protocol is down出现该结果的可能原因是（）
正确答案 ：C
两端设备协议不一致
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