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AWS Certified Advanced Networking – Specialty (ANS-C01) Certification Guide
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Computers use Internet Protocol addresses to connect and exchange information. The challenge is that humans don’t remember sequences of numbers well, but they’re very good at remembering sequences of words. The DNS allows humans to tell computers where to go by using words. The DNS is a distributed database containing all the information needed to convert a human-readable name into the numerical address of a computer connected to the internet. Without the DNS, the internet would be nearly impossible to use. With this context set, it’s important to understand some key terms. The following short paragraphs provide definitions of key concepts, which will be discussed in detail starting with the next section.
Databases need an organizational structure, a way to search for and navigate to the record you’re looking for. The records contained within the database should have a consistent format, and there must be a way to request and receive...