What does the 'Tier' classification imply about a registrar?

The 'Tier' classification in relation to a registrar refers to its role in the domain registration hierarchy. Registrars are categorized into tiers based on their position in the ecosystem of domain name registration.

Tier 1 registrars are often seen as direct representatives of top-level domain registries and can sell domain names directly to the public. In contrast, Tier 2 registrars typically operate through partnerships with Tier 1 registrars, selling domain names to resellers and the end users indirectly. The classification helps understand the structure of domain name registration, outlining which registrars have direct access to certain domains and which do not. This tier system helps to clarify the layers of responsibility and service provision in the domain registration process, indicating how different registrars interact with registries and customers.

While the other options mention aspects related to accessibility, geographic coverage, and domain management capacity, they do not capture the hierarchical framework that 'Tier' classification specifically addresses. The distinctions made by 'Tier' primarily focus on the relation between different registrar types within the larger domain registration ecosystem.