Web Science/Part1: Foundations of the web/Domain Name System/Review some facts about DNS/quiz

{What kind of questions can be answered by DNS?} + Which ipv4 address belongs to a domain? + What is the name server of a domain? + Which ipv6 address belongs to a domain? + Is there a mail server existing for this domain? + What is the canonical name of a domain?

{Which of the following statements are true?} - All hosts in a domain must be in the same network + A domain can be attached to various name servers + A domain can be resolved to various IP addresses - A domain can be resolved either to an IPv4 or an IPv6 address. - All hosts in a domain must be in the same geographical region. - DNS will always resolve the IP address that is geographically closest to you. + DNS can be used for load balancing
 * Even thouth this would be nice this is not true.
 * Yes since the DNS will randomly return one of the attached IP addresses for a domain this can be used for load balancing.

{Which of the following statements about the connection between DNS and IP routing hold true?} + DNS is built on top of IP. + In order to resolve addresses and make DNS queries IP routing will be used most of the time to speak to the various name servers. - Root name servers do not need to have an IP address. + Root name servers are not necessary if you have a local copy of the root.zone file. - IP routing is hierarchical. + DNS is hierarchical.