CompTIA A+ Certification Core 2 (220-1102) - Understanding DNS

The video tutorial explains the Domain Name System (DNS) and its crucial role in the Internet. It covers the transition from host files to DNS, the hierarchical structure of DNS, and how it resolves domain names to IP addresses. The tutorial also discusses DNS caching, domain registration, and the use of DNS in email authentication through technologies like DMARC, DKIM, and SPF.

What is the significance of the 256 character limit in DNS?

How does DMARC help in preventing domain spoofing?

What is DKIM and how does it contribute to email security?

Explain the purpose of the Sender Policy Framework (SPF) in email communication.