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#firewalls
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Explain three types of firewall ?
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Feb 8
1. Packet Filtering Firewall: This type of firewall examines each packet of data that passes through it and filters them based on a set of predefined rules. These rules can include criteria such as source and destination IP addresses, port numbers, and protocol types. Packet filtering firewalls are typically fast and efficient but provide limited security as they only inspect individual packets and do not have the ability to analyze the context or content of the data.
2. Stateful Inspection Firewall: Stateful inspection firewalls combine the packet filtering approach with the ability to maintain a record of the state of network connections. They keep track of the state of each connection and use this information to make more informed decisions about which packets to allow or block. By understanding the context of the traffic, stateful inspection firewalls provide better security than packet filtering firewalls. They can also detect and prevent certain types of attacks, such as IP spoofing and port scanning.
3. Application Layer Firewall: Also known as proxy firewalls, application layer firewalls operate at the application layer of the network stack. They act as intermediaries between the client and the server, inspecting the content of the data packets and making decisions based on the application-specific protocols being used. Application layer firewalls provide the highest level of security as they can analyze the entire network packet, including the payload, and can enforce more granular access control policies. However, they can introduce additional latency due to the extra processing required.
2. Stateful Inspection Firewall: Stateful inspection firewalls combine the packet filtering approach with the ability to maintain a record of the state of network connections. They keep track of the state of each connection and use this information to make more informed decisions about which packets to allow or block. By understanding the context of the traffic, stateful inspection firewalls provide better security than packet filtering firewalls. They can also detect and prevent certain types of attacks, such as IP spoofing and port scanning.
3. Application Layer Firewall: Also known as proxy firewalls, application layer firewalls operate at the application layer of the network stack. They act as intermediaries between the client and the server, inspecting the content of the data packets and making decisions based on the application-specific protocols being used. Application layer firewalls provide the highest level of security as they can analyze the entire network packet, including the payload, and can enforce more granular access control policies. However, they can introduce additional latency due to the extra processing required.
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