List of most common DNS records

The Domain Name System (DNS) is essential for the Internet to work. Network administrators deal daily with DNS records. But DNS and its records can be hard to digest for new people in this business.

If you want to understand the functionality of the most common DNS records, here you have!

A or AAAA records

These two DNS records are in charge of linking a domain name with its corresponding IP address.

Both records have the same purpose. The difference is that A works with Internet Protocol version 4 (IPv4), while AAAA works with Internet Protocol version 6 (IPv6).

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What do you need to know about TTL?

TTL: Definition

Time-to-live (TTL) is the value that specifies the time period or number of hops that a data packet must travel to be alive. Either across the network or in the memory cache. It will be terminated when this timer expires, or the data packet reaches its hop limit. Data packets are not all the same; they vary in size and shape, but each has a different TTL. The amount of time data packets should live in a device to perform their missions should be determined.

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