Dns — Test 1

Correct Answer: A. A. 255 characters
Explanation: An entire hostname can have a maximum of 255 characters. Although each label must be from 1 to 63 characters long. Host name is actually a label that is given to a device in a network.

Correct Answer: B. B. DNS resolver
Explanation: DNS client also known as DNS resolver also known as DNS lookup helps to resolve DNS requests using an external DNS server.

Correct Answer: B. B. By contacting remote DNS server
Explanation: Whenever a request is received at server from other domains, it handles this situation by contacting remote DNS server.

Correct Answer: D. D. All of the mentioned
Explanation: Domain Name system not only deals with mapping IP addresses with the hostname but also deals with exchange of information in the server.

Correct Answer: A. A. Server asks to the root server
Explanation: Root name servers are actually very important and critical as they are the first step in translating human readable hostnames into IP addresses for carrying out communication.

Correct Answer: A. A. Dynamic DNS
Explanation: Dynamic DNS or in short DDNS or DynDNS helps in automatically updating a name server in the DNS. This does not require manual editing.

Correct Answer: B. B. *
Explanation: A wildcard DNS record matches requests to a non existent domain name. This wildcard DNS record is specified by using asterisk “*” as the starting of a domain name.

Correct Answer: D. D. Internet corporation for assigned names and numbers
Explanation: The ICANN (Internet Corporation for Assigned Names and Numbers) deals with IP address space allocation, protocol identifier assignment, generic and country code Top Level domain name system management (gTLD and ccTLD).

Correct Answer: A. A. Distributed database system
Explanation: A domain name system is maintained by a distributed database system. It is a collection of multiple, logically interrelated databases distributed over a computer network.