COPY: Master the Domain Name System (DNS)
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Questions and Answers

What is the purpose of DNS?

  • To encrypt user queries and nameserver responses
  • To store information about a domain name
  • To translate domain names to IP addresses (correct)
  • To delegate the right to use a domain name

    • What is the most common type of record stored in the DNS database?

  • CNAME
  • PTR
  • SOA (correct)
  • RP

    • What is a DNS resolver?

  • A DNS server that is authoritative for a record
  • The client side of the DNS that initiates and sequences queries for full resolution of the resource sought (correct)
  • A DNS server that queries other DNS servers on behalf of the requester
  • A DNS server that publishes information about a domain

    • What is a non-recursive query?

    <p>Provides a record for which the server is authoritative or provides a partial result without querying other servers</p> Signup and view all the answers

    What is a circular dependency in DNS?

    <p>When a name server in delegations is identified by name rather than IP address</p> Signup and view all the answers

    What is the purpose of DNS caching?

    <p>To reduce the load on DNS servers by caching results locally or in intermediate resolver hosts</p> Signup and view all the answers

    What is a reverse DNS lookup?

    <p>A query of DNS for domain names when the IP address is known</p> Signup and view all the answers

    What are Resource Records (RR) used for in DNS?

    <p>To store information about a domain name, including the IP address of the server that hosts the domain's website</p> Signup and view all the answers

    What is the purpose of domain name registrars?

    <p>To delegate the right to use a domain name</p> Signup and view all the answers

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