NETWORK SECURITY
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Packet Filter Firewall
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Stateful Firewall
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Proxy Firewall
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Application Firewall
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Detailed explanation-1: -Firewall systems filter network traffic across several layers of the OSI network model. The most common applications cover: The data-link layer.
Detailed explanation-2: -Application-level gateway firewalls work on Layer 7, application layer, of the OSI reference model. They inspect and route internet traffic to and from the requested web address and the user.
Detailed explanation-3: -Packet-filtering firewalls operate at the network layer (Layer 3) of the OSI model. Packet-filtering firewalls make processing decisions based on network addresses, ports, or protocols.
Detailed explanation-4: -A stateful firewall is a kind of firewall that keeps track and monitors the state of active network connections while analyzing incoming traffic and looking for potential traffic and data risks. This firewall is situated at Layers 3 and 4 of the Open Systems Interconnection (OSI) model.