The Domain Name System makes it easy for every user to navigate the internet. One of its most important components are A records, which link a domain name to an individual IP address. Only a line of text is needed. But what does this kind of record look like, and how can you perform an A record check?
Without the Domain Name System, the internet as we know it today would be inconceivable. The system for name resolution itself, is based on DNS records. In these simply structured records in normal text files, a name is stored for each IP address. However, DNS records can do more than this. Also known as resource records, various types of them exist.
The Domain Name System enables the use of domain names for surfing and is based on zone files. These in turn are made up of different records. The first DNS entry you encounter in such a data file is always the SOA record. This determines authority within the zone. We explain how the records are designed and how you can perform an SAO record check.
PTR records turn the DNS on its head: Instead of getting from a domain name to the corresponding IP address – as is normally the case – with reverse DNS the opposite occurs. Which domains belong to an IP address? You can acquire this information using PTR records, which are a special type of DNS record. How do the DNS records need to be structured for this?
The Domain Name System and name resolution enable hassle-free surfing for users on the World Wide Web. Here, the DNS has recourse to several types of resource records. One of these is CNAME. This allows different domains to be linked together with one IP address. But how do CNAME records work and how can you check the records?
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