单项选择题

Which of the following is TRUE about the ping -f command?（）

A. It is useful for diagnosing data dependent problems by filling the packet with the byte pattern following the "f" in the command line.
B. It is useful for flooding from slow character based terminals since it only displays a dot "." for each packet sent in fast mode.
C. It is useful for flooding from slow character based terminals since it only displays a dot "." for each packet sent and a backspace on returned in fast mode.
D. The command can only be run by root.

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热门试题

单项选择题Whichofthefollowingcommandsshouldbeusedtodetermineifaremoteprintqueueisdown?（）

A. lsqdev
B. lpstat
C. lptest
D. prtconf

单项选择题Whichofthefollowingproblemshasoccurredwhenamessageappearsonthesystemconsoleindicatingthatadumpmustbecopiedtoexternalmedia?（）

A. The external dump device is full.
B. The dump device was not mirrored before the dump happened.
C. The boot failed while copying the dump from paging space to a file.
D. The dump device was not set to a paging device before the dump happened.

单项选择题Acustomerindicatesthatasystemisexperiencingprintingproblems.Aftercheckingthesystem,andsuccessfullyprinting,noproblemhasbeenfound.Whichofthefollowingproceduresshouldbeperformednexttofurtherclarifytheproblem?（）

A. Reboot the system.
B. Check the file system sizes.
C. Have the customer repeat the task to recreate the problem.
D. Inform the customer that no problems were found， and to call back if the problem reoccurs.

单项选择题Whenausertriestologintothesystem,thefollowingerroroccurs: 3004-004.Youmust exec loginfromthelowestloginShell .Whichofthefollowingproceduresshouldbeperformednexttodeterminethecauseoftheproblem?（）

A. Reboot the system.
B. Increase the number of ptys.
C. Increase number of licenses.
D. Run df -k to check for full filesystems.

单项选择题Whatisthedefaultconfigurationfileusedbythesyslogddaemon?（）

A. /etc/syslog.h
B. /etc/syslog.pid
C. /usr/sbin/syslogd
D. /etc/syslog.conf