[单选题]At which layer of the OSI model does the protocol that provides the information displayed by the "show cdp neighbors" command operate?

正确答案 ：D

Data link

解析：解析：Explanation:

[单选题]When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?

正确答案 ：D

when every operating switch port is in either the blocking or forwarding state

解析：解析：Explanation:

[单选题]帧中继环境下，为了区分虚电路，应该使用的地址是（）

正确答案 ：C

DLCI

[多选题]How could the Ezonexam corporation benefit from using VLANs on their network?(Select three answer choices.)

正确答案 ：AE

VLANs allow access to network services based on department, not physical location.

VLANs establish segmented broadcast domains in switched networks.

解析：A,E,F 解析：Explanation:

[单选题]下列路由协议中，属于链路状态路由协议的是（）

正确答案 ：D

OSPF

[单选题]What is the purpose of the Spanning Tree Protocol (STP)?

正确答案 ：D

To maintain a loop-free Layer 2 network topology

解析：解析：Explanation:

[单选题]某台PC，能ping通路由器，但不能telnet到路由器，可能的原因是（）

正确答案 ：D

telnet密码未设置

[单选题]备份路由器IOS的命令是：()

正确答案 ：A

copy flash tftp

[单选题]某网络中，拟设计10子网，每个子网中放有14台设备，用IP地址段为199.41.10.X，请问符合此种规划的子网掩码是()

正确答案 ：C

255.255.255.240

[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址所在子网的广播地址为（）

正确答案 ：D

192.168.50.71

查看原题