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單項(xiàng)選擇題

A system administrator needs to specify a set of FQDN to IP address mappings for a legacyserver； the administrator does not want the legacy server to be referenced by other servers. Which of the following should the administrator use to set this？（）

A.DHCP server
B.DNS server
C.Host file
D.Route statements

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單項(xiàng)選擇題

An administrator is troubleshooting a problem on an application server, but has not determined the cause of the problem and is not able to replicate the problem. Which of the following should the administrator do prior to escalating the issue?（）

A. Gather information from users.
B. Reboot the server.
C. Apply the latest service packs to the operating system.
D. Perform a root cause analysis

單項(xiàng)選擇題

Several remote sales employees， who have come into the office this week， report that they are unable to get on the Internet， but no other users have reported similar issues. The help desk hasescalated the issue and the case notes state that the users have IP addresses that begin with 169. Which of the following should the system administrator check FIRST？（）

A.DHCP server
B.Network switches
C.DNS server
D.Core router