单项选择题
A company has a small network，consisting of a single switch and a single router. The switch has been configured with two vlans，and route-on-a-stick is being configured on the router for inter-vlan routing. A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate？（）
A.one
B.three
C.two
D.zero
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多项选择题
What can a network administrator utilize by using PPP Layer 2 encapsulation (Choose three.) （）。
A.VLAN support
B.compression
C.authentication
D.sliding windows
E.multilink support
F.quality of service -
单项选择题
网络管理员在交换机1上创建一个新VLAN并且将主机C和主机D加入到此VLAN中。管理员配置交换机接口FastEthernet0/13到FastEthernet0/24成为新VLAN成员.但是网络管理员完成配置以后，主机A可以和主机B通信，但是主机A不能和主机C或者主机D通信。哪个命令可以用来解决这个问题？（）
A.
B.
C.
D.
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单项选择题
What is the effect of using the service password-encryption command?（）
A.Only passwords configured after the command has been entered will beencrypted.
B.Only the enable password will be encrypted.
C.Only the enable secret password will beencrypted
D.It will encrypt the secret password and remove the enable secret password from the configuration.
E.It will encrypt all current and future passwords.
