![The TCP/IP Guide - DNS Structural Elements and Terminology: Domains, Subdomains, and Nodes; Roots, Leaves and Branches; Parents, Children and Siblings The TCP/IP Guide - DNS Structural Elements and Terminology: Domains, Subdomains, and Nodes; Roots, Leaves and Branches; Parents, Children and Siblings](http://www.tcpipguide.com/free/diagrams/dnstree.png)
The TCP/IP Guide - DNS Structural Elements and Terminology: Domains, Subdomains, and Nodes; Roots, Leaves and Branches; Parents, Children and Siblings
What is a second-level domain? For example, https://www.example.co.uk. Is the second level domain .co? - Quora
![The TCP/IP Guide - DNS Structural Elements and Terminology: Domains, Subdomains, and Nodes; Roots, Leaves and Branches; Parents, Children and Siblings The TCP/IP Guide - DNS Structural Elements and Terminology: Domains, Subdomains, and Nodes; Roots, Leaves and Branches; Parents, Children and Siblings](http://www.tcpipguide.com/free/diagrams/dnstreefamily.png)