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DNS records are simple instructions that are associated with a particular domain name. In the DNS zone, the full collection of entries is compiled in a zone file. All of this information is stored on the authoritative DNS server for the relevant domain name. Each record serves a certain purpose. As a result, they are all extremely important for the domain’s proper operation.
The Host command is a built-in utility software with a command-line interface (CLI) for DNS probing. You could find it pre-installed on most Linux distros like – Ubuntu, Linux Mint, Red Hat, or macOS. It serves perfectly for network diagnostics. In addition, the most common use of host command is to complete DNS lookups and check different information about a domain name and its DNS records.
It is a very light and quick tool that can give you data about different DNS records, such as A, AAAA, MX, NS, SOA, and more. In addition, it can provide you with information for the host, for instance, its IP addresses or check nameservers.
The Domain Name System, or the DNS for short, is an organized namespace that uses a decentralized model. Its main purpose is to navigate queries, find the host they are searching for, and answer them quickly. The DNS came in the 80s to replace the inefficient HOSTS.txt file that had all the current hosts at the time. The DNS is superior thanks to the scalability and speed.
