單項選擇題Which command enables RSTP on a switch?（）

A.spanning-tree mode rapid-pvst
B.spanning-tree uplinkfast
C.spanning-tree backbonefast
D.spanning-tree mode mst


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1.單項選擇題

Refer to the exhibit.Two routers have just been configured by a new technician. All interfaces are up. However， the routers are not sharing their routing tables. What is the problem？（）

A.Split horizon is preventing Router2 from receiving routing information from Router1.
B.Router1 is configured for RIP version 2,and Router2 is configured for RIP version 1.
C.Router1 has an ACL that is blocking RIP version 2.
D.There is a physical connectivity problem between Router1 and Router2.
E.Router1 is using authentication and Router2 is not.

3.單項選擇題There are no boot system commands in a router configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?（）

A.Flash,TFTP server,ROM
B.Flash,NVRAM,ROM
C.ROM,NVRAM,TFTP server
D.NVRAM,TFTP server,ROM
E.TFTP server,Flash,NVRAM

4.多項選擇題Cisco自防御網絡，有以下哪些工具提供安全服務（）

A.Cisco安全管理器
B.Cisco IOS軟件
C.Cisco安全代理
D.MARS

5.多項選擇題What are three benefits of implementing vlans？（）

A.A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure
B.Broadcast storms can be mitigated by decreasing the number of broadcast domains，thus increasing their size
C.A higher level of network security can be reached by separating sensitive data traffic from other network traffic
D.Port-based vlans increase switch-port use efficient，thanks to 802.1Q trunks
E.A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure
F.Broadcast storms can be mitigated by increasing the number of broadcast domains，thus reducing theirsize
G.VLANs make it easier for IT staff to configure new logical groups，because the vlans all belong to thesame broadcast domain