Which of the following files should be edited so that tftpd is running with the -n option？（）

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

单项选择题AnAIXserverisconfiguredwithastaticIPaddressbutthesystemadministratorwantstheservertogiveoutIPaddressesforclientswhowanttousethedynamichostconfigurationprotocolinsteadofstaticIPaddresses.Howisthisaccomplished？（）

A.Use SMIT to have the server use DHCP instead of a static address
B.Edit /etc/rc.tcpip and start the dhcpsd daemon
C.Use the network options command to enable ipforwarding
D.Edit /etc/rc.net to set network options back to default

单项选择题Theorderofnameresolutioncanbecontrolled. Thedefaultis： 1.DNS BIND 2.NIS 3. etc hosts Tochangetheorderoftheabovenameresolutions，whichofthefollowingshouldbeused？（）

A.nslookup
B.hostname
C./etc/host.equiv
D.environment variable NSORDER

单项选择题WhichofthefollowingentriesisINVALIDinthe etc resolv.conffile？（）

A.nameserver 127.0.0.1
B.# gargoyl is128.66.12.1
C.domainname peanut.com
D.search peanut.com cashew.com brazil.com almond.com