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 packet
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static packet filtering
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Both A and B
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Neither A nor B
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Detailed explanation-1: -SPI firewalls can handle both ICMP and UDP. Ingress ACL rules typically permit a specific externally originated connection to internal network resources. In ingress and egress filtering, an SPI firewall always considers its ACL rules when a new packet arrives that attempts to open a connection.
Detailed explanation-2: -The SPI Firewall Protection feature keeps track of the state of network connections traveling across it. This feature protects your internet connection against threats and Denial of Service (DoS), which is why it is recommended to keep it enabled.
Detailed explanation-3: -An SPI (stateful packet inspection) firewall protects you by examining incoming packets against existing connections. In contrast, a stateless firewall bases the examination on static values such as source or destination addresses. It does not take into account the packet’s connection traffic.
Detailed explanation-4: -Stateful inspection, also known as dynamic packet filtering, is a firewall technology that monitors the state of active connections and uses this information to determine which network packets to allow through the firewall.