单项选择题
A. Ping sweep B. Packet sniffer C. Traceroute D. Port scanner
On which of the following network devices would an admi...
单项选择题On which of the following network devices would an administrator configure an ACL?（）
A.Router B.Hub C.Repeater D.NIC
Which of the following ports is the default telnet port...
单项选择题Which of the following ports is the default telnet port?（）
A.20 B.21 C.22 D.23
Which of the following cables is the MOST susceptible t...
单项选择题Which of the following cables is the MOST susceptible to interference?（）
A.Fiber B.Coax C.UTP D.STP
