Which system provides redundant system clocks?（）……

单项选择题During an attempt to scp between two hosts, an error indicating PRNG is not seeded is displayed. What is the likely cause of the error?（）

A.The sshd user id is locked.
B.The /var/empty directory needs to be created.
C.PRNG is set to 'no' in the /etc/ssh/sshd_config file.
D.The permissions on /dev/random and /dev/urandom are incorrect.

单项选择题What must an administrator do to prevent new telnet users from connecting to the system?（）

A.rmdev -l /dev/pts
B.touch /etc/nologin
C.chdev -l sys0 -a nologin
D.chuser -a login=false ALL

单项选择题IBM remote support for hardware maintenance is required for several mission critical Power 595 servers. The data center is very security conscious and does not allow internet access. How should an administrator configure outbound connectivity of Electronic Service Agent?（）

A.VPN
B.Modem
C.Private LAN
D.Pass-through systems

单项选择题A system administrator is creating four LPARs on a Power 550. The Power 550 has 64GB of memoryinstalled and 32GB activated. The system administrator sets the minimum dedicated memory to 8GB in the profile for each LPAR. After activating three LPARs, he is not able to activate the fourth LPAR. What is the likely cause of the problem?（）

A.The Power 550 is licensed for three LPARs only.
B.There is not enough memory to meet the minimum dedicated memory requirement for the fourth LPAR. A faulty memory DIMM is detected in the POWER5 550.
C.There is not enough memory to meet the minimum dedicated memory requirement for the fourth LPAR. The HMC reserves some memory to perform logical partition tasks.
D.There is not enough memory to meet the minimum dedicated memory requirement for the fourth LPAR. The hypervisor reserves some memory to perform logical partition tasks.

单项选择题Which command will determine if the Trusted Computer Base is enabled on a system?（）

A.getrunmode
B.getsecconf
C.tcbck -display
D.odmget -q attribute=TCB_STATE PdAt