单项选择题 A stateless firewall requires a technician to:（）

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?（）