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In this video, the presenter discusses how encryption works, linking it to a previous explanation of DNS. He introduces the concept by imagining himself as a client, wanting to communicate with a server represented by a fully qualified domain name (FQDN) that maps to one or more IP addresses. The presenter highlights the role of a DNS client in making a request to a DNS service, which returns the corresponding IP address if not already cached. He emphasizes that modern web communication utilizes encryption, with all web pages typically using HTTPS for secure communication. The video aims to clarify the basics of how encryption underpins secure online interactions.