Final answer:
The information listed after the period in a domain name is the extension. The information after the period in a domain name is indeed the extension or Top-Level Domain, which indicates the nature of the domain.
Step-by-step explanation:
The statement is true - the information listed after the period in a domain name is indeed the extension. A domain name consists of two parts - the main domain and the extension. The main domain is the unique name chosen by the owner, and the extension represents the type of organization or the country associated with the website. For example, in the domain name www.example.com, 'com' is the extension.
In the structure of a domain name, the part following the last period is known as the Top-Level Domain (TLD) or extension. For example, in the domain name www.example.com, '.com' is the TLD. This can indicate the nature of the domain, such as whether it's commercial (.com), educational (.edu), governmental (.gov), and so forth.