單項選擇題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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1.多項選擇題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

3.單項選擇題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.

4.多項選擇題Which two are advantages of static routing when compared to dynamic routing？（）

A.Security increases because only the network administrator may change the routing tables.
B.Configuration complexity decreases as network size increases.
C.Routing updates are automatically sent to neighbors.
D.Route summarization is compued automatically by the router.
E.Routing traffic load is reduced when used in stub network links.
F.An efficient algorithm is used to build routing tables，using automatic updates.
G.Routing tables adapt automatically to topology changes.

5.多項選擇題以下兩個選項是工作在OSI模型的應用層的？（）

A.ping
B.Telnet
C.FTP
D.TCP
E.IP