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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ingress
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egress
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Both A and B
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Neither A nor B
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Detailed explanation-1: -In ingress filtering, the firewall examines packets entering the network from the outside, typically from the Internet.
Detailed explanation-2: -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-3: -Firewalls do not stop provable attack packets. Antivirus servers can only find viruses, not other types of malware. Centralized firewall management systems automatically create ACLs from policies.
Detailed explanation-4: -On the Internet, packet filtering is the process of passing or blocking packets at a network interface based on source and destination addresses, ports, or protocols. The process is used in conjunction with packet mangling and Network Address Translation (NAT).
Detailed explanation-5: -A stateful inspection, aka dynamic packet filtering, is when a firewall filters data packets based on the STATE and CONTEXT of network connections. Let’s explore what “state” and “context” means for a network connection.