单项选择题 Referring to the exhibit, you are asked to rate-limit traffic from Web-Server to the subnet where Mal-User is located. All other traffic should be permitted. Which firewall filter configuration do you use?（）

单项选择题 Referring to the exhibit, you want to block HTTP access to Web-Server from the subnet where Mal-User is located. All other traffic should be permitted.Which firewall filter configuration do you use?（）

单项选择题 Given the configuration shown in the exhibit, what is the function of the protect-loopback filter?（）