A firewall rule that filters on the protocol field of an IP packet is acting on which layer of the OSI reference model?
Click on the arrows to vote for the correct answerA. B. C. D.
Firewall rule that filters on the protocol field of an IP packet is acting on the network layer of the OSI reference model.
The OSI reference model is a conceptual model that describes the communication process between different networking devices. It is divided into seven layers, each of which has a specific function. The layers are:
The network layer is responsible for routing and forwarding packets based on their network addresses. It handles the logical addressing and routing of data packets between different networks.
A firewall is a security device that monitors and controls traffic based on a set of rules. These rules define what traffic is allowed to pass through the firewall and what traffic is blocked.
When a firewall filters on the protocol field of an IP packet, it is examining the network layer protocol information to determine whether to allow or block the packet. For example, a firewall rule might allow only packets using the TCP protocol to pass through the firewall.
Therefore, the correct answer is A. network layer.