單項選擇題

When making changes to a server, which of the following is the BEST way to troubleshoot a problem?（）

A. Perform root cause analysis and then test the theory to determine the cause.
B. Make changes to the system and document everything once the problem is resolved.
C. Make multiple changes to all affected areas to resolve all potential issues.
D. Make a change and if the problem is not resolved, reverse the change.

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多項選擇題

Which of the following are examples of physical security measures?（）

A. Policies and procedures
B. Encryption
C. Locked doors
D. Security personnel
E. Backup tapes

單項選擇題

A new server was installed. Most clients are located in the same subnet as the server and can successfully access the server. Clients located on different subnets have been unable to access the server, but have no trouble accessing other servers on their subnet.
Which of the following is the reason that these clients are unable to access the server?（）

A. DHCP has assigned the wrong addresses.
B. Incorrect default gateway on the server.
C. DNS entries were not created.
D. WINS server is not responding.

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When making changes to a server, which of the following is the BEST way to troubleshoot a problem?（）

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Which of the following are examples of physical security measures?（）