单项选择题
Which of the following components provides for the BEST hardware cooling features？（）
A. Epoxy paste
B. Chip fan
C. Heat sink
D. Virtualization
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Anadministratorneedstoaddfaulttolerancecapabilitiestoaserver.Whichofthefollowingisthe BESTsolutiontoaccomplishthis？（）
A. Move the architecture from 32-bit to 64-bit.
B. Install a PBX card.
C. Install a second NIC card.
D. Install a fail-over cable. -
单项选择题
WhichofthefollowingcabletypesshouldbeusedtoachieveGigabitEthernetspeed？（）
A.CAT5
B.CAT3
C.CAT6
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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.
