Which statement describes the characteristics of packet-filtering and stateful firewalls as they relate to the OSI model?

 

Last Updated on November 2, 2020 by InfraExam

Which statement describes the characteristics of packet-filtering and stateful firewalls as they relate to the OSI model?

  • Both stateful and packet-filtering firewalls can filter at the application layer.
  • A stateful firewall can filter application layer information, whereas a packet-filtering firewall cannot filter beyond the network layer.
  • A packet-filtering firewall typically can filter up to the transport layer, whereas a stateful firewall can filter up to the session layer.
  • A packet-filtering firewall uses session layer information to track the state of a connection, whereas a stateful firewall uses application layer information to track the state of a connection.
    Answers Explanation & Hints:

    Packet filtering firewalls can always filter Layer 3 content and sometimes TCP and UDP-based content. Stateful firewalls monitor connections and thus have to be able to support up to the session layer of the OSI model.

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