Description: A domain link in DNS refers to the relationship between different domains and their DNS records. This concept is fundamental to the hierarchical structure of the Domain Name System (DNS), which allows the translation of human-readable domain names into IP addresses that computers can understand. Domain links facilitate the interconnection between different domains, allowing a main domain to point to subdomains or other domains, which is essential for the organization and management of resources on the web. Additionally, these links are crucial for the implementation of services such as email, where MX (Mail Exchange) records allow emails to be correctly directed to their destination servers. In summary, domain links are an integral part of the functioning of DNS, ensuring that users can efficiently and effectively access online resources.