An administrator issues the show ip interface s0/0 command a

【名词&注释】

交换机(switch)、物理层(physical layer)、一对一(one to one)、是什么(what is)、数据链路层(data link layer)、源地址转换

[单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

A. The cable is attached properly.
B. CDP has discovered the connected device.
C. Keepalives are being received on the interface.
D. A carrier detect signal has been received from the connected device.
E. IP is correctly configured on the interface.

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[单选题]Cisco IOS命令ip nat inside source static 10.1.1.5 172.35.16.5的作用是什么()

A. 为所有的外部NAT创建一个全局的地址池
B. 为内部的静态地址创建动态的地址池
C. 它为所有内部本地PAT创建创建了动态源地址转换
D. 为内部本地地址和内部全局地址创建一对一的映射关系

[单选题]交换机工作在OSI七层模型的哪一层()

A. 物理层
B. 数据链路层^{(data link layer)}
C. 网络层
D. 传输层

[单选题]对交换机的描述，正确的是（）

A. 单广播域，单冲突域的设备
B. 单广播域，多冲突域的设备
C. 多广播域，单冲突域的设备
D. 多广播域，多冲突域的设备

[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有效IP为（）

A. 192.168.50.33---192.168.50.39
B. 192.168.50.41---192.168.50.50
C. 192.168.50.65---192.168.50.70
D. 192.168.50.66---192.168.50.75

[多选题]There are 2 switches in the Ezonexam LAN, with no routers. Ports 1, 2 & 3 are assigned to VLAN 1 in switch 1 and 2 and ports 4, 5 & 6 are assigned to VLAN 2 in both switches. These two switches are connected together via a trunked link. Which of the conditions below would verify trunk and VLAN operation? (Select all valid answers)

A. Host 1 on VLAN 1 can ping Host 2 on VLAN 1
B. Host 1 on VLAN 1 can ping Host 4 on VLAN 2
C. Host 1 on VLAN 1 can not ping Host 2 on VLAN 1
D. Host 4 on VLAN 2 can not ping Host 1 on VLAN 1
E. Host 4 on VLAN 2 can ping Host 2 on VLAN 2

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