单项选择题
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？（）
A.Application
B.File
C.Directory services
D.Print -
单项选择题
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.
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单项选择题
An administrator has just installed a web server for the companys Internet site. After bringing the system online， customers notify the administrator that they cannot connect to the server. The administrator tests the web server from a workstation and can access the website. The customers continue to report issues. Which of the following is the MOST likely reason for this？（）
A. The servers firewall is misconfigured.
B. The server’s timeout feature is set incorrectly.
C. The web server was not installed properly.
D. The company firewall is misconfigured.
