單項選擇題Which command is used to copy the configuration from RAM into NVRAM？（）

A. copy running-config startup-config
B. copy startup-config: running-config
C. copy running config startup config
D. copy startup config running config
E. write terminal


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2.多項選擇題The network administrator of the Oregon router adds the follwing command to the router configuration: ip route 192.168.12.0 255.255.255.0 172.16.12.1. What are the results of adding this command?（）

A. The command establishes a static route
B. The command invokes a dynamic routing protocol for 192.168.12.0
C. Traffic for network 192.168.12.0 is forwarded to 172.16.12.1
D. Traffic for all networks is forwarded to 172.16.12.1
E. This route is automatically propagated throughout the entire network
F. Traffic for network 172.16.12.0 is forwarded to the 192.168.12.0 network

3.多項選擇題The OSPF hello protocol performs which of the following tasks?（）

A. It provides dynamic neighbor discovery
B. It detects unreachable neighbors in 90 second intervals
C. It maintains neighbor relationships
D. It negotiates correctness parameters between neighboring interfaces
E. It uses timers to elect the router witch the fastest links as the designated router
F. It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF

4.多項選擇題Which of the following describe private IP addresses?（）

A.addresseschosenbyacompanytocommunicatewiththeInternet
B.addressesthatcannotberoutedthroughthepublicInternet
C.addressesthatcanberoutedthroughthepublicInternet
D.aschemetoconservepublicaddresses
E.addresseslicensedtoenterprisesorISPsbyanInternetregistryorganization


5.多項選擇題Which three statements about VTP features are true?（）

A. When properly configured,VTP minimizes VLAN misconfigurations and configuration inconsistencies
B. Each broadcast domain on a switch can have its own unique VTP domain
C. VTP works at Layer 3 of the OSI model and requires that a management VLAN IP address be configured.
D. When properly configured,VTP maintains VLAN configuration consistency and accelerates trunk link negotiation.
E. VTP pruning is used to increase available bandwidth in trunk links
F. Client,server,and transparent are valid VTP modes
G. To configure a switch to be part of two VTP domains,each domain must have its own passwords