单项选择题

Telneting from any machine on the network is taking 75 seconds. Which of the following procedures should be checked to correct the error?（）

A. Check /etc/hosts.
B. Check /etc/resolv.conf.
C. Check for packet errors.
D. Check to see if the master server is up.

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IBM(000-235)

Telneting from any machine on the network is taking 75 seconds. Which of the following procedures should be checked to correct the error?（）