單項選擇題Assuming default setting，how can you erase the VTP data base of VLANs on a CISCO IOS switch running in VTP server mode？（）

A.Enable VTP pruning
B.From privileged mode，erase the startup configuration file，then reload.
C.From privileged mode，erase the vlandate file，then reload.
D.Cycle the switch power.


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1.單項選擇題一個默認的幀中繼WAN被分類為哪種物理網(wǎng)絡類型？（）

A.點到點
B.廣播多路訪問
C.非廣播多路訪問
D.非廣播多點
E.廣播點到多點

2.單項選擇題What is the function of the command switchport trunk native vlan 999 on a？（）

A.It designates VLAN 999 for untagged traffic.
B.It blocks VLAN 999 traffic from passing on the trunk.
C.It createsa VLAN 999 interface.
D.It designates VLAN 999 as the default for all unkown tagged traffic.

3.多項選擇題What are three features of the IPV6 protocol？（）

A.complicated header
B.plug-and-play
C.no broadcasts
D.checksums
E.optional IPsec
F.autoconfiguration

4.單項選擇題Which of these represents an IPv6 link-local address？（）

A.FE08：：280e：611：a：f14f：3d69
B.FE81：：280f：512b：e14f：3d69
C.FE80：：380e：611a：e14f：3d69
D.FEFE：0345：5f1b：：e14d：3d69

5.多項選擇題Which two statements about static NAT translations are true？（）

A.They are always present in the NATt able.
B.They allow connection to be initiated from the outside.
C.They can be configured with access lists，to allow two or more connections to be initiated from the outside.
D.They require no inside or outside interface markings because addresses are statically defined.