COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Network address Translation Firewall
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Application Layer Firewall
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Host-based Firewall
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None of the above
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Detailed explanation-1: -Packet filtering A network layer firewall or packet-filtering firewall works at the network layer of the Open Systems Interconnection (OSI) model and can be configured to deny or allow access to specific ports or Internet Protocol (IP) addresses.
Detailed explanation-2: -Proxy firewalls, also known as application-level firewalls, filter network traffic at the application layer of the OSI network model.
Detailed explanation-3: -A packet filtering firewall is a network security technique that is used to control data flow to and from a network. It is a security mechanism that allows the movement of packets across the network and controls their flow on the basis of a set of rules, protocols, IP addresses, and ports.
Detailed explanation-4: -The packet filtering firewall filters IP packets based on source and destination IP address, and source and destination port.