單項(xiàng)選擇題Which of the following logical volume placement policies is likely to give the best performance in most cases, all other factors being equal?()

A. INTRA-POLICY set to ’edge’, INTER-POLICY set to maximum
B. INTRA-POLICY set to ’center’, INTER-POLICY set to maximum
C. INTRA-POLICY set to ’middle’, INTER-POLICY set to minimum
D. INTRA-POLICY set to ’center’, INTER-POLICY set to minimum


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1.單項(xiàng)選擇題The system administrator notices that IP packets are not getting forwarded. The system administrator wants to use an AIX machine as an internetwork router over TCP/IP networks. Which of the following commands will allow this change on the fly?()

A. Some network attributes are runtime attributes that can be changed at any time. Others are loadtime attributes that must be set before the netinet kernel extension is loaded and be placed in the /etc/rc.net or /etc/rc.bsdnet file. This parameter cannot be done on the fly, since a reboot is required.
B. Add to the /etc/rc.net file or if a Berkelye-style network configuration, /etc/rc.bsdnet, and issue the command: no -a ipforwarding=1 to start ipforwarding immediately.
C. Add to the /etc/rc.net file or if a Berkeley-style network configuration, /etc/rc.bsdnet, and issue the command: no -o ipforwarding=0 to start ipforwarding immediately.
D. Add to the /etc/rc.net file or if a Berkeley-style network configuration, /etc/rc.bsdnet, and issue the command: no -o ipforwarding=1 to start ipforwarding immediately.

3.單項(xiàng)選擇題After issuing the nfsstat -rs command, the null received column starts to grow. This indicates which of the following conditions?()

A. Not enough NFS daemons running
B. Too many NFS daemons running
C. nfs_tcp_socketsize is too small
D. nfs_tcp_socketsize is too large

4.單項(xiàng)選擇題Which of the following is true about rmss?()

A. rmss is a part of performance toolbox and stands for Reduced Memory System Simulator
B. rmss is a part of perfpmr and stands for Real Memory System Simulator
C. rmss is part of the standard bos.perf filesets and stands for Redundant Memory System Simulator
D. rmss is part of  WLM and stands for Real Memory System Simulator

5.單項(xiàng)選擇題A system administrator increases the mbuf pool allocation, then runs vmstat. It is noticed that the paging rate has not decreased. What is the most effective option to maintain the mbuf pool and decrease paging?()

A. Increase the number of CPUs.
B. Increase the physical memory.
C. Set the PSALLOC environment variable to ’late’.
D. Set the PSALLOC environment variable to ’early’.

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Which of the following is true about rmss?()

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Which of the following commands should be used to identify packet sequence problems?()

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Which command series should be used to determine whether file paging or paging space paging is a problem when running a program from an idle system?()

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After issuing the nfsstat -rs command, the null received column starts to grow. This indicates which of the following conditions?()

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To examine the Exhibit, press the Exhibit button. While a user is compiling a C program, "vmstat 120 10" is run to determine the cause of a performance problem.  Using the vmstat output as shown in the exhibit, which of the following conclusions is most appropriate to draw about the I/O bottleneck?()

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