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Free F50-513 Exam Braindumps (page: 4)

Page 3 of 13
PDF with 49 Questions

Which statement about root DNS servers is true?

  1. Root servers have databases of all registered DNS servers.
  2. Root servers have database of the DNS server for top-level domains.
  3. Root servers have databases of DNS servers for each geographical area. They direct requests to appropriate servers.
  4. Root servers have database of commonly accessed sites. They also cache entries for additional server as requests are made.

Answer(s): B



With standard DNS,assuming no DNS request failures,which process decribes the normal resolution process on a “first time” DNS request?

  1. Client requests address from root server,root server returns ip address to Authoritative DNS, Authoritative DNS returns requested IP address,LDNS returns requested IP address to client.
  2. Client requests address from LDNS,LDNS requests from GTM,GTM requests from Authoritative DNS, Authoritative DNS returns requested IP address,LDNS returns requested IP address to client
  3. Client requests address from LDNS,Authoritative DNS receives request from root server,root server returns LDNS address,LDNS returns client address,Authoritative DNS returns requested IP address, LDNS returns requested IP address to client.
  4. Client requestes address from LDNS,LDNS requestes from rootserver,root server returns Authoritative DNS address,LDNS requestes from Authoritative DNS, Authoritative DNS returns requested IP address,LDNS returns requested IP address to client

Answer(s): D



What is the difference between primary and secondary DSN servers?

  1. Only primary servers can issue authoritative responses.
  2. Primary servers host the orignal copy of the zone database file.
  3. Primary servers resolve names more efficiently than secondary servers.
  4. Secondary servers act as back-ups and will respond only if the primary fails.

Answer(s): B



A GTM System performs a name resolution that is not a Wide-IP. The name is in a domain for which the GTM System is authoritative.Where does the information come from?

  1. It comes from BIND database(zone) files on the GTM System.
  2. GTM System can not resolve a host name that is not a Wide-IP.
  3. It comes from the database of previously cached name resolutions.
  4. It comes from a zone transfer initiated when the request was received.

Answer(s): A






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