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？（）

单项选择题InaDNSenvironment，thezonefilethatmapshostnamestoIPaddress（sometimescalledthenamed.hostsfile），iscreatedonwhichofthefollowingservers？（）

A.Cache
B.Primary
C.Secondary
D.Primary and secondary

单项选择题WhatisthefirststepinsettingupaPrimaryDomainNameServer？（）

A.Create the cache file
B.Create the IP zone file
C.Create the named.boot file
D.Create the name zone file

单项选择题Whichofthefollowingfilesshouldbeeditedsothattftpdisrunningwiththe-noption？（）

A. etc/services
B./etc/inetd.conf
C. /etc/tftpd.conf
D. /etc/rc.net

单项选择题AusercannotpinganyotherhostnamesfromanAIXmachine.Theerrorreceivedis hostnameearthNOTFOUND .Whichofthefollowingfilesismostlikelyconfiguredincorrectly？（）

A./etc/resolv.conf
B./etc/rc.tcpip
C./etc/aliases
D./etc/hosts.equiv

单项选择题Whatisthedefaultamountoftimethatanautomounteddirectorystaysmounted？（）

A.1minute
B.5minutes
C.10minutes
D.30minutes