单项选择题

A DNS server for a large network is experiencing performance problems. Which of the following options is the best solution to fix the problem？（）

A.Enable NIS
B.Purchase a larger server
C.Use /etc/hosts on all of the systems
D.Create secondary name servers throughout the network

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IBM(000-236)

A DNS server for a large network is experiencing performance problems. Which of the following options is the best solution to fix the problem？（）