World of Computer Networking Your CCNA start - Structure of a Domain Name System (DNS) Registry versus Library

The video tutorial explains the structure and function of the DNS registry, comparing it to a library system. It covers the hierarchical structure of DNS, including top-level domain (TLD) servers, authoritative name servers, and the various DNS records that store information about domain names. The tutorial highlights the optimized search capabilities of DNS and the redundancy of name servers. It concludes with a practice activity to check domain information using online resources.

What is the role of a top-level domain name server in the DNS hierarchy?

• It acts as a root server.

• It stores records for individual domain names.

• It serves as an index for all domain names.

• It is equivalent to a rack of books in a library.

Which of the following is an example of an authoritative name server?

• dns.google.com

• ns1.google.com

• server.google.com

• root.google.com

What type of information is stored in a DNS record?

• The author of the domain

• The number of pages in the domain

• The IP address associated with the domain

• The physical location of the server

What is the purpose of having redundant name servers?

• To enhance the security of DNS records

• To increase the speed of DNS queries

• To provide backup in case one server fails

• To store additional domain records

Which DNS record type is used to point to the mail server for a domain?

• CNAME record

• A record

• MX record

• TXT record

What is the main advantage of the DNS hierarchical structure?

• It simplifies the process of finding domain names.

• It allows for faster internet speeds.

• It reduces the cost of maintaining servers.

• It increases the security of domain information.

How does a DNS client retrieve the necessary record for a domain?

• By contacting the root server directly

• By querying the specific name server

• By accessing the top-level domain server

• By searching through all available name servers