单项选择题
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
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相关考题
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单项选择题
WhendividinganexistingClassBnetworkinto2subnetsof32，766hostseach，whichofthefollowingsubnetmasksshouldbeused？（）
A.128.0.0.0
B.255.128.0.0
C.255.254.0.0
D.255.255.128.0 -
单项选择题
Ahostistobecomepartofahierarchicalnamingtopology.Whichofthefollowingservicesarerequired？（）
A.DHCP
B.Domain Name Service
C.Network Information Service
D.A hosts file -
单项选择题
ToaddaTTYTerminaltoSerialport1，whichofthefollowingsetofoptionsshouldbechosen？（）
A.tty rs232 Asynchronous Terminal then sa1 Available 01-S2 Standard I/O Serial Port
B.tty rs422 Asynchronous Terminal then sa1 Available 01-S2 Standard I/O Serial Port
C.tty rs232 Asynchronous Terminal then sa0 Available 01-S1 Standard I/O Serial Port
D.tty rs422 Asynchronous Terminal then sa0 Available 01-S1 Standard I/O Serial Port
