单项选择题
A user has a small network of four computers that they want to connect to a single cable modem. Which of the following devices would allow the user to do this？（）
A.Four port switch
B.Four port wireless router
C.Four port WAP
D.Four port hub
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A.The WINS server is not resolving names properly.
B.The DNS server is not resolving names.
C.The DHCP server is out of IP address leases.
D.The hosts file is corrupted. -
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B.Number of wires
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