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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Stateful Inspection Firewall (Circuit-Level Gateway)
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Application-level Gateway
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NAT Filtering
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Packet Filtering
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Detailed explanation-1: -It only allows communication if the session between two endpoints is perfectly established; otherwise, it will block communication. Even though these security requirements offer advanced security, they consume many system resources and can significantly slow down traffic.
Detailed explanation-2: -Two primary types of products utilize deep packet inspection: firewalls that have implemented features of IDS, such as content inspection, and IDS systems that aim to protect the network rather than focus only on detecting attacks.
Detailed explanation-3: -Stateful inspection firewalls – also known as dynamic packet-filtering firewalls – monitor communication packets over time and examine both incoming and outgoing packets.
Detailed explanation-4: -Stateful firewalls are capable of monitoring and detecting states of all traffic on a network to track and defend based on traffic patterns and flows. Stateless firewalls, however, only focus on individual packets, using preset rules to filter traffic.