World of Computer Networking Your CCNA start - Responsibilities of Domain Name System (DNS) Servers

The video tutorial explains the four types of DNS servers: recursive DNS resolvers, root name servers, TLD name servers, and authoritative name servers. Each server type has specific roles in processing DNS queries. Recursive DNS resolvers handle client requests and cache data. Root name servers direct requests to TLD name servers, which manage information about authoritative name servers. Authoritative name servers store DNS records and resolve queries. The tutorial concludes by comparing the DNS registry to a library for better understanding.

What is the primary function of a recursive DNS resolver?

• To redirect requests to TLD name servers

• To store all DNS records for a domain

• To interact with DNS clients and handle recursive requests

• To maintain information about authoritative name servers

How does a recursive DNS resolver improve efficiency?

• By storing all domain records permanently

• By caching data to avoid unnecessary requests

• By using a faster internet connection

• By directly connecting to authoritative name servers

What is the role of root name servers in the DNS hierarchy?

• To resolve DNS queries for specific records

• To store DNS records for all domains

• To handle recursive requests from clients

• To redirect requests to TLD name servers

How do TLD name servers assist in the DNS process?

• By storing all DNS records for a domain

• By redirecting requests to root name servers

• By maintaining information about authoritative name servers

• By handling recursive requests from clients

What type of DNS records do authoritative name servers hold?

• Only CNAME and TXT records

• All DNS records for a specific domain

• Only root server information

• Only A and MX records