单项选择题
A. Write more packet filters.
B. Write less packet filters.
C. Purchase a license for states.
D. Upgrade definitions manually
单项选择题 How many bits are in an IPv6 address?（）
单项选择题 A small office in which all workstations are using an ISP provided IP range has noticed a consistent decrease in network traffic speed. The decrease does not occur when the gateway to the ISP is disconnected. Which of the following should the administrator implement?（）
多项选择题 Which of the following wireless standards can be used to avoid the 2.4GHz range?（） (Select TWO).