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單項(xiàng)選擇題At which layer of the OSI model dose PPP perform?（）

A.Layer 3
B.Layer 4
C.Layer 2
D.Layer 5

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1.多項(xiàng)選擇題The network technician is planning to use the 255.255.255.224 subent mask on the network.which three valid IP addresses can the technician use for the hosts？（）

A.172.22.243.127
B.172.22.243.191
C.172.22.243.190
D.10.16.33.98
E.10.17.64.34
F.192.168.1.160

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2.多項(xiàng)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

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3.多項(xiàng)選擇題 如圖，每個交換機(jī)都配置了主機(jī)名，也都運(yùn)行了RSTP，在就沒有做其他的配置了。下面哪三個選項(xiàng)正確的描述了RSTP的端口角色？（）

A.SwitchA上，F(xiàn)a0/2，指定
B.SwitchA上，F(xiàn)a0/1，根
C.SwitchB上，GI0/2，根
D.SwitchB上，GI0/1，指定
E.SwitchC上，F(xiàn)a0/2，根
F.SwitchD上，GI0/2，根

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4.單項(xiàng)選擇題On which options are standard access lists based?（）

A.destination address and wildcard mask
B.source address and wildcard mask
C.destination address and subnet mask
D.source address and subnet mask

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5.多項(xiàng)選擇題Two switches are connected through a trunk link.which two commands show that there is a native VLAN mismatch on that link?（）

A.show interfaces interface
B.show vlan bri
C.show interfaces interface switchport
D.show interface interface trunk
E.show interfaces vlan

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