多项选择题

一个公司正在安装IP电话。电话和办公室电脑连接到同个设备上，为了保证电话数据的最大传输量，公司需要确定电话流量是和办公室电脑的数据流量不是在同一个网络上。以下哪个是最好的网络设备，用来直连到电话和电脑，并且，哪种技术应该被配置在该设备上？（）

A.hub
B.router
C.switch
D.STP
E.subinterfaces
F.VLAN

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单项选择题

An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC.If a reply is received, what does this confirm?（）

A.The PC has connectivity with a local host.
B.The PC has connectivity with a Layer 3 device.
C.The PC has a default gateway correctly configured
D.The PC has connectivity up to Layer 5 of the OSI model
E.The PC has the TCP/IP protocol stack correctly installed.

单项选择题

根据下图显示的拓扑结构和路由器配置，一个在该LAN上的主机正在通过INTERNET访问一个FTP服务器。下列地址中哪个可以作为路由器发送到该目的服务器的数据包的源地？（）

A.10.10.0.1
B.10.10.0.2
C.199.99.9.33
D.199.99.9.57
E.200.2.2.17
F.200.2.2.18

单项选择题

How does using the service password encryption command on a router provide additional security?（）

A.by encrypting all passwords passing through the router
B.by encrypting passwords in the plain text configuration file
C.by requiring entry of encrypted passwords for access to the device
D.by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
E.by automatically suggesting encrypted passwords for use in configuring the router