What term refers to the highest level in the DNS hierarchy?

The highest level in the DNS hierarchy is referred to as the Root Level. This is crucial because the Root Level acts as the starting point for the entire Domain Name System (DNS) structure. It oversees the top-level domains (TLDs), which include common extensions like .com, .org, and country-specific extensions such as .uk and .ca.

The DNS hierarchy is structured in a way that the Root Level is at the apex, and beneath it are the TLDs. Each TLD can further have its own second-level domains (like example.com) and subdomains (like sub.example.com). By understanding this hierarchy, one can effectively appreciate how internet domain names are organized and resolved to their corresponding IP addresses, a foundational concept in networking.