Web Science/Part1: Foundations of the web/Domain Name System/Zones/quiz

{Which of the following statements is true? - every zone is a domain. + zones should overlap for delegation to work. - zones must not overlap for delegation to work. + In theory the size of zones is unlimited
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{Who manages the root.zone file} - Paul Mockapetris and Jon Postel The inventors of DNS. - The inventor of the Internet. - The inventor of the web. - It is an open source project with version control and everyone can edit it like Wikipedia articles. + The American Government. + The Internet Corporation for Assigned Names and Numbers (ICANN)

{Have a look at the root.zone file. How many name servers exist that can resolve the de. top level domain? - 1 - 2 - 3 - 4 - 5 + 6 - 7
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 * you could search in the root.zone file for de. and then look at the entries where this domain will be resolved to and check if there are according name server entries.

{Have a look at the root.zone file. Which of the following IPv4 addresses leads to an name server that can resolve queries for the de. domain? + 77.67.63.105 + 194.246.96.1 - 46.4.170.51 - 91.198.174.231 + 81.91.164.5
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 * yes this is the ip address of l.de.net
 * yes this is the ip address of z.nic.de
 * that is the ip address of studywebscience.org
 * that is the ip address behind en.wikiversity.org
 * yes this is the ip address of f.nic.de