单项选择题

Which system provides redundant system clocks?（）

A.Power 595
B.Power 560
C.Power 570
D.Power 550

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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