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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packet
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stateful
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application
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proxy
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Detailed explanation-1: -The first firewalls were packet-filtering firewalls that work at the Network layer of the OSI networking model. They examine the packet headers that contain IP addresses and packet options and block or allow traffic through the firewall based on that information.
Detailed explanation-2: -A packet filtering firewall allows and blocks network traffic by examining information in the IP packet header such as source and destination addresses, ports, and service protocols. A packet filtering firewall:-Uses ACLs or filter rules to control traffic.
Detailed explanation-3: -Stateful Inspection Firewall Like the static filtering firewall, stateful inspection firewalls allow or block traffic based on technical properties, such as specific packet protocols, IP addresses, or ports.
Detailed explanation-4: -A packet-filtering firewall examines packets in isolation and does not know the packet’s context. A stateful inspection firewall examines network traffic to determine whether one packet is related to another packet.