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Stop 02 · Networking Fundamentals for CloudTopics · 3/9

DNS

Part of the Cloud Computing Roadmap

In short

The Domain Name System translates human-readable domain names into IP addresses — understanding record types (A, CNAME, MX, TXT) and cloud-managed DNS services (Route 53, Cloud DNS) is essential for deploying any web-facing service.

How to learn this

  1. 1Run dig or nslookup on a domain to see DNS resolution in action.
  2. 2Explore a managed DNS service's console (Route 53 or equivalent) to see how records are configured.
  3. 3Understand DNS propagation delay and why DNS changes aren't instant everywhere.

More topics at this stop

OSI & TCP/IP ModelsIP Addressing & SubnettingHTTP/HTTPS & TLSVirtual Private Clouds (VPCs)Load BalancersFirewalls & Security GroupsCDNs (Content Delivery Networks)VPNs & Direct Connect / Interconnect

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