Cisco CloudCenter: Get the Hybrid IT Advantage

Second-Level Domain (SLD)

Definition - What does Second-Level Domain (SLD) mean?

A second-level domain is a specific part of a website, page domain name or URL address that complements a top-level domain. One of the easiest ways to define a second-level domain is that it consists of that portion of the domain name to the left of the ".com" or other similar extension, which is called a top-level domain. Analysis of the top-level and second-level domains helps to analyze a URL or page address.

Techopedia explains Second-Level Domain (SLD)

In a very general sense, a second-level domain is often thought of as the "name" of the domain. The top-level domain, which is an extension such as ".com," is fairly generic. Although it is the controlling address feature, it does not help to distinguish a site from others. The second-level domain often plays this role; for example, in a domain name like "," the word "google," as the second-level domain, is where domain holders put the brand name, project name, organization name or other familiar identifier for users.

In addition to these common second-level domains, there is also the idea of a country code second-level domain (ccSLD). Here, the second-level domain is actually to the right of the decimal delineator; for example, in a domain like "," the country code top-level domain is the "uk" portion, whereas the ccSLD is the ".co."

Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.