单项选择题
A. Provides users access to network resources.
B. Performs router commands after user authentication.
C. Provides users with remote access only capabilities.
D. Does not require an authentication server
单项选择题 Users are reporting that they are still experiencing network issues even though a fix was recentlyapplied. Which of the following troubleshooting methodology steps is the administrator using?（）
单项选择题 Which of the following has the HIGHEST data rate speed?（）
单项选择题 Which of the following should be used to test an internal NIC without having to connect it to thenetwork?（）