Internet Protocol version 4, or simply for short IPv4, is a very popular protocol despite the fact it was developed years ago. Thanks to it, we are able to connect our devices (computers, laptops, smartphones, tablets) to the web. Every time one device wants to access the global network, meaning the Internet, it receives an individual numerical IP address, for instance, 18.104.22.168. The purpose is to send or receive data from one machine to another via the web. Yet, to achieve that we should use the identifiers – IP addresses. Discover more information about IPv4.
The DNS records are simple text-based instructions related to a specific domain name. They are collected in a zone file in a DNS zone. Moreover, all of that information is kept in the authoritative DNS server for the domain name. The DNS records have one main purpose – to provide the needed information and rules for a domain, for instance, the IP address. We should mention that the DNS records could be of various different types. Each type of DNS record is created for a specific intention. Read more about some of the most popular DNS record types.
DNS propagation refers to a particular amount of time that is required for updating the DNS data (DNS records) in the entire global network of servers. These changes do not happen instantly because nameservers are designed to keep the DNS information in their cache memory for a specific time period defined by the TTL (Time-to-Live) values. Once it expires, the servers are able to check and refresh their data. For that reason, it is best if you plan well your DNS changes. That is going to minimize the chance for you to experience downtime. Find out additional information about DNS propagation!