NETWORK SECURITY
FIREWALLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They use a simple policy table lookup that filters traffic based on specific criteria.
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all of the above
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They provide stateful packet filtering, using connection information held in a state table.
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None of the above
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Detailed explanation-1: -Description. A stateful firewall keeps track of the state of network connections, such as TCP streams, UDP datagrams, and ICMP messages, and can apply labels such as LISTEN, ESTABLISHED, or CLOSING.
Detailed explanation-2: -Stateful packet inspection While a packet filtering firewall only examines an individual packet out of context, a stateful firewall is able to watch the traffic over a given connection, generally defined by the source and destination IP addresses, the ports being used, and the already existing network traffic.
Detailed explanation-3: -Packet filtering firewall However, these firewalls don’t route packets; rather they compare each packet received to a set of established criteria, such as the allowed IP addresses, packet type, port number and other aspects of the packet protocol headers.