单项选择题
A.Layer 1 B.Layer 3 C.Layer 4 D.Layer 5
Which of the following security devices would MOST like...
单项选择题Which of the following security devices would MOST likely be used on a network to screen and prevent malicious traffic?（）
A.IDS B.VPN C.NIPS D.HIDS
Which of the following is an intelligent repeater that ...
单项选择题Which of the following is an intelligent repeater that is aware of the MAC addresses of the nodeson either side of the data link?（）
A.Gateway B.Hub C.Bridge D.Router
Which of the following WAN technologies uses a telephon...
单项选择题Which of the following WAN technologies uses a telephone cable?（）
A.POTS B.FDDI C.SONET D.Cable modem
