单项选择题
A.Power cycle the VPN concentrator at the office.
B.Determine if the VPN service is running at the office.
C.Reinstall the VPN client at the remote computer.
D.Determine if the user has the correct VPN address and password.
单项选择题 Which of the following routing protocols uses AS-Path as one of the methods to build the routing table?（）
单项选择题 There are two networks sharing the same office space. One network already has an 802.11g accesspoint. The second network acquires one as well. If known, which of the following would help keep the two networks from interfering with each other?（）
单项选择题 Which of the following traffic types would a network layer firewall be unable to filter?（）