Which command will set the core size file to unlimited for the user‘webapp’？（）

单项选择题Which environment variable must be changed in auser’s profile so that upon login，the command prompt identifies the server？（）

A.PMT
B.PS1
C.PRT
D.PT1

单项选择题Which command should be used to reset a failed login count?（）

A.chsec
B.chusr
C.passwd
D.chgusrprf

单项选择题Which daemon identifies available filesystems throughthe etc xtab file?（）

A.nfsd
B.biod
C.rpc.lockd
D.rpc.mountd

单项选择题A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency?（）

A.Two switch ports will be needed on a switch, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
B.Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
C.Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, two different IP addresses will be needed.
D.One switch port will be needed on one switch, a splitter will be needed to split the connection, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and two different IP addresses will be needed.

单项选择题After updating serverBs network configurations, anadministrator notices that serverA, which resides in a different subnet, is unable to communicate with serverB via ssh or telnet. As pings to the server fail, the administrator logs onto serverB via a console and finds an available interface en0 in the up state. From the console connection, en0 can communicate with other servers in the same subnet. What is the most likely cause of the problem?（）

A.en0 has no associated ip address.
B.serverB is missing its default route.
C.serverB and serverA cannot connect due to a firewall.
D.en0 has been set up to block traffic from servers that are in different subnets.