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Domain Name System: Quiz


Question 1: When domain names are registered with a ________ their installation at the domain registry of a top level domain requires the assignment of a primary name server and at least one secondary name server.
Independent Domain RegistriesNetwork SolutionsDomain name registrarGo Daddy

Question 2: An often used analogy to explain the Domain Name System is that it serves as the "phone book" for the Internet by translating human-friendly computer hostnames into ________.
IPv6IPv4Classless Inter-Domain RoutingIP address

Question 3: Some operating systems, such as ________, are known to have resolver implementations that use TCP for all queries, even when UDP would suffice.
Hewlett-PackardHP-UXIBM AIXSolaris (operating system)

Question 4: Alternatively a single hostname may correspond to many IP addresses: this can facilitate ________ and load distribution, and also allows a site to move physical location seamlessly.
Fault-tolerant systemRedundancy (engineering)Fault-tolerant designFailure transparency

Question 5: Because of this, ________ (WWW) hyperlinks and Internet contact information can remain consistent and constant even if the current Internet routing arrangements change or the participant uses a mobile device.
NetscapeWebsiteHTMLWorld Wide Web

Question 6: DNS responses are traditionally not cryptographically signed, leading to many attack possibilities; The ________ (DNSSEC) modifies DNS to add support for cryptographically signed responses.
Transport Layer SecurityIPv6IPsecDomain Name System Security Extensions

Question 7: The right to use a domain name is delegated by domain name registrars which are accredited by the ________ (ICANN), the organization charged with overseeing the name and number systems of the Internet.
Country code top-level domainGeneric top-level domainTop-level domainICANN

Question 8: For this purpose generally only the fully qualified domain name of the name server is required, unless the servers are contained in the registered domain, in which case the corresponding ________ is needed as well.
IP addressClassless Inter-Domain RoutingIPv6IPv4

Question 9: For most of the more than 240 ________ (ccTLDs), the domain registries maintain the WHOIS (Registrant, name servers, expiration dates, etc.) information.
.coCountry code top-level

Question 10: Registrant information associated with domain names is maintained in an online database accessible with the ________ service.
InterNIC.comWHOISInternationalized domain name

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