Network layer firewall works as a __________
Question
Network layer firewall works as a __________
Solution
A network layer firewall works as a packet filter.
Here are the steps it follows:
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The firewall reviews the packet details, including the source and destination IP addresses, the protocol used (such as TCP or UDP), and the source and destination ports.
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It then compares this information to a set of predefined or user-created rules that determine whether the packet is to be forwarded or discarded.
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If the packet matches a rule that allows it to be forwarded, the firewall does so. If it matches a rule that causes it to be discarded, the firewall discards the packet.
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If the packet does not match any rule, the firewall applies a default rule. The default rule is usually to discard the packet, but it can be set to forward the packet.
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The firewall continues this process for each packet that attempts to pass through it.
Similar Questions
Firewalls operate at the:Group of answer choicesNetwork and application layerInterface between LANs and WANsIP layer of a computer networkNetwork layer
What is a firewall?
A firewall is a component or set of components that restricts access between a protected network and other sets of networks and are often used to protect an organisation’s networks from the Internet. a. Briefly describe the operational characteristics of: • a simple packet filter; • a stateful packet filter; • an application gateway; • a circuit level gateway.
Select the firewall type in each scenario.A firewall that monitors the state of traffic on a network.A firewall that filters a packet based on the packet's destination IP address.A firewall that allows all packets to a specific IP address.A firewall that blocks all TCP packets.
what is the use of firewall
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