单项选择题
Which of the following cable types should be used to achieve Gigabit Ethernet speed？（）
A.CAT5
B.CAT3
C.CAT6
D.Thicknet
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An email server has been installed； however， the staff reports that they are unable to receive email from external email addresses， but they can email each other. Which of the following is the MOST likely reason for this？（）
A. The company firewall is blocking SMTP ports.
B. The DHCP server is misconfigured.
C. The DNS server is only resolving internal name spaces.
D. The email server should be configured to resolve names by IP addresses. -
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Whichofthefollowingservertypesstoresusers’homedirectoryfolders？（）
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B.File
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WhichofthefollowingistheBESTwaytomakesurethenetworkprinterisautomaticallyinstalled whentheuserlogson？（）
A.Log onto the user’s computer as a local administrator and install the printer.
B.Make sure the user has permission to print to the printer.
C.Create and implement a logon script.
D.After the user has logged on， install the printer.
