单项选择题

Which of the following files should contain the statement "hosts=local， bind"？（）

A./etc/hosts
B./etc/irs.conf
C./etc/netsvc.conf
D./etc/resolv.conf

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单项选择题

A machine must have the most direct access possible to two different networks. However， it cannot act as a router between the networks. Which of the following arrangements is most appropriate to facilitate the machine’s accessibility？（）

A.ipforwarding turned on and two adapters
B.One adapter， with a route to a default gateway
C.An adapter in each network， and ipforwarding off
D.An adapter in each network， with a route only to the default gateway

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In order to increase reliability， minimize collisions and establish a large number of systems on an Ethernet segment， which of the following options should be selected for the Ethernet network？（）

A.10BaseT
B.Switched 10BaseT
C.Switched 100BaseT Half-Duplex
D.Switched 100BaseT Full-Duplex

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Which of the following class networks contains 65，534 hosts？（）

A.Class A
B.Class B
C.Class C
D.Class D