CompTIA A+ Certification Core 1 (220-1101) - Understanding DNS

The video tutorial explains the concept of DNS as the Internet's contact list, similar to how we use contact lists on phones. It covers the transition from host files to DNS, the hierarchy of DNS servers, and the process of domain name resolution. The tutorial also discusses DNS caching, domain registration, and the role of DNS in email authentication using technologies like DMARC, DKIM, and SPF.

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