單項(xiàng)選擇題

Which of the following files contains the settings for the system’s DNS domain name and DNS servers？（）

A./etc/hosts
B./etc/resolv.conf
C./etc/netsvc.conf
D./etc/named.boot

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單項(xiàng)選擇題

Which of the following options best justifies why a DNS server should be run in a large network system？（）

A.To use ftp and telnet
B.To perform NFS mounts
C.To make /etc/hosts files unnecessary
D.To reduce network traffic and save bandwidth

單項(xiàng)選擇題

When dividing an existing Class B network into 2 subnets of 32，766 hosts each， which of the following subnet masks should be used？（）

A.128.0.0.0
B.255.128.0.0
C.255.254.0.0
D.255.255.128.0