[单选] Since HTTP is one of the most common protocols used in the internet， what should be done at a firewall level to ensure thatthe protocol is being used correctly？ （）

什么是质化研究，有哪些主要特点？ 如果SC1单板检测到R-LOS告警，他会向对端回送一条（）告警。 R-SLIP。 T-SLIP。 OSC-RDI。 OSC-REI。 What are three advantages of VLANs?（） VLANs establish broadcast domains in switched networks.。 VLANs utilize packet filtering to enhance network security.。 VLANs provide a method of conserving IP addresses in large networks.。 VLANs provide a low-latency internet working alternative to routed networks.。 VLANs allow access to network services based on department, not physical location.。 VLANs can greatly simplify adding, moving, or changing hosts on the network.。 大卫是谁？耶西的儿子是谁？近来悖逆主人奔逃的仆人甚多。我岂可将饮食和为我剪羊毛人所宰的肉，给我不知道从哪里来的人呢？”这话谁说的？ What are some virtues of implementing end-to-end VLANs？（） End-to-end VLANs are easy to manage.。 Users are grouped into VLANs independent of a physical location.。 Each VLAN has a common set of security and resource requirements for all members.。 Resources are restricted to a single location.。 Since HTTP is one of the most common protocols used in the internet， what should be done at a firewall level to ensure thatthe protocol is being used correctly？ （）