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单项选择题

Which command enables RSTP on aswitch?（）

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

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多项选择题
Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0？（）

A.113.10.4.0
B.186.54.3.0
C.175.33.3.255
D.26.35.2.255
E.17.35.36.0
单项选择题
When two hosts are trying to communicate across a network, how does the host originating thecommunication determine the hardware address of the host that it wants to "talk" to?（）

A.RARP request
B.Show Network Address request
C.Proxy ARP request
D.ARP request
E.Show Hardware Address request
单项选择题
Which network protocol does DNS use?（）

A.FTP
B.TFTP
C.TCP
D.UDP
E.SCP
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