单项选择题
When run on a machine called client， which of the following commands would mount the /usr/local/bin directory from the host machine over the /home/bin directory on client？（）
A.mount host：/usr/local/bin /home/bin B.mount client：/home/bin /usr/local/bin C.mount -o client：/usr/local/bin /home/bin D.mount -n host：/home/bin /usr/local/bin
单项选择题 InaDNSenvironment，thezonefilethatmapshostnamestoIPaddress（sometimescalledthenamed.hostsfile），iscreatedonwhichofthefollowingservers？（）
单项选择题 WhatisthefirststepinsettingupaPrimaryDomainNameServer？（）
单项选择题 Whichofthefollowingfilesshouldbeeditedsothattftpdisrunningwiththe-noption？（）
