Why are top level domains important? Where is it used commonly? - Quora
Domain Name System (DNS) in Application Layer - GeeksforGeeks
What is a top-level domain in the domain name system (DNS)? - Quora
This is how the domain name system works – Norid
Domain Name System (DNS) - DENIC eG
Novell Doc: NW 6.5 SP8: Novell DNS/DHCP Services Administration Guide - DNS
second level domain (SLD) :: ITWissen.info
What are root name servers? | Netnod
domain name system (DNS) :: ITWissen.info
TLDs -- Putting the '.fun' in the top of the DNS
DNS root server | Cloudflare
Top-level domain nameservers | Managing Mission - Critical Domains and DNS
OpenBSD as a domain name server - The Domain Name System
What is a DNS root server and what do they do? - Quora
Introduction to the Domain Name System (DNS) | Opensource.com
Fully qualified domain name - Wikipedia
Chapter 4. introduction to DNS
DNS 101: An introduction to Domain Name Servers | Enable Sysadmin
The TCP/IP Guide - DNS Structural Elements and Terminology: Domains, Subdomains, and Nodes; Roots, Leaves and Branches; Parents, Children and Siblings
Novell Documentation: DNS/DHCP - DNS Hierarchy
What is DNS and DNS hierarchy? - Web Developer Tutorials
Hosts and IP addresses
What is DNS (Domain Name System)?
Introduction to DNS
