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.

What is the primary function of DNS?

How does the DNS system improve user experience on the Internet?

What is the difference between a root server and a DNS server?

Describe the role of authoritative servers in the DNS process.

Explain the process that occurs when you type a URL into a web browser.

What is the significance of caching in DNS?

What are fully qualified domain names and how are they created?

What measures can be taken to prevent domain spoofing?

Explain the concept of D Mark DMARC in relation to DNS.

What challenges does DNS face in terms of spam management?