DNS Fundamentals
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Questions and Answers

What is the primary function of a firewall?

  • To maintain timekeeping accuracy in a clock
  • To implement scalability in a web server
  • To manage dependency checking in a package manager
  • To implement policy (correct)

    • What is the term for the difference between the time reported by a clock and the true time as defined by UTC?

  • Clock skew
  • Offset (correct)
  • Disciplining the clock
  • Clock drift

    • Which of the following is NOT a characteristic of a good web server?

  • Scalability
  • Security (correct)
  • Reliability
  • Correctness

    • What is the organization responsible for assigning IP addresses and managing the global IP address space?

    <p>IANA</p> Signup and view all the answers

    What is the name of the file that is used to map hostnames to IP addresses on a local machine?

    <p>hosts.txt</p> Signup and view all the answers

    What is the name of the protocol that is used to synchronize the time on a computer with a reference time source?

    <p>NTP</p> Signup and view all the answers

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