A firewall rule that filters on the protocol field of an IP packet is acting on which layer of the OSI reference model?
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A. B. C. D.A.
Accurate Answer.
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.