单项选择题
Which of the following ports is the default telnet port?（）
A.20
B.21
C.22
D.23
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单项选择题
Which of the following cables is the MOST susceptible to interference?（）
A.Fiber
B.Coax
C.UTP
D.STP -
单项选择题
An administrator is concerned about users utilizing the companys wireless signal with their personal laptops. Which of the following is the BEST method to use to prevent unauthorized devices from using the companys wireless network?（）
A. Secure VPN
B. MAC filtering
C. IP filtering
D. Static IP addresses -
单项选择题
Which of the following network cable types requires grounding?（）
A.STP
B.UTP
C.Fiber
D.Serial
