Firewalls and Network Security
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Questions and Answers

What is a primary advantage of running a firewall as a dedicated device?

  • It is easier to design correctly and inspect for bugs. (correct)
  • It is easier to configure.
  • It is more difficult to design correctly.
  • It is more vulnerable to external attacks.

    • What is a characteristic of a reference monitor, such as a firewall?

  • It is only used for internal networks.
  • It is not necessary for network security.
  • It is only invoked occasionally.
  • It is always invoked and cannot be avoided. (correct)

    • What is the primary function of a firewall's security policy?

  • To allow all traffic to pass through.
  • To block all traffic from passing through.
  • To monitor internal network traffic.
  • To determine what traffic can or cannot pass through. (correct)

    • What type of firewall is described in the example configuration, where external traffic can reach specific internal servers and ports?

    <p>Packet filtering firewall. (D)</p> Signup and view all the answers

    What is the primary benefit of a small and simple firewall design?

    <p>It is easier to analyze for bugs and vulnerabilities. (B)</p> Signup and view all the answers

    What is the primary function of a firewall?

    <p>To filter all traffic between a protected and less trustworthy network (D)</p> Signup and view all the answers

    What is a characteristic of a reference monitor, such as a firewall?

    <p>It is always invoked and tamperproof (B)</p> Signup and view all the answers

    What type of firewall sees only addresses and service protocol type?

    <p>Packet Filtering (D)</p> Signup and view all the answers

    What type of firewall maintains state information from one packet to another in the input stream?

    <p>Stateful Inspection (A)</p> Signup and view all the answers

    What is the purpose of a firewall's security policy?

    <p>To set rules for what traffic can or cannot pass through (C)</p> Signup and view all the answers

    What type of firewall is similar to a packet filter?

    <p>Simplest decision-making rules (C)</p> Signup and view all the answers

    What is the primary function of a firewall in a network?

    <p>To determine what to let in and/or out of the internal network (C)</p> Signup and view all the answers

    What type of firewall operates at the network layer?

    <p>Packet filter (B)</p> Signup and view all the answers

    What is a key characteristic of a stateful packet filter?

    <p>It keeps track of the state of network connections (D)</p> Signup and view all the answers

    What is the analogy used to describe the role of a firewall in a network?

    <p>A firewall is like a secretary (D)</p> Signup and view all the answers

    What type of firewall is designed for a single user or a small home network?

    <p>Personal firewall (A)</p> Signup and view all the answers

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