DNSzónák

DNSzónák, also known as DNS zones, are fundamental components of the Domain Name System (DNS). A DNS zone is a portion of the DNS namespace that is managed by a specific administrative entity, typically a domain name registrar or a system administrator. It contains a set of DNS records that map domain names to IP addresses and other information.

Each DNS zone has a unique name, such as "example.com". Within this zone, all the subdomains and their associated records are managed. For instance, "www.example.com" and "mail.example.com" would be part of the "example.com" zone. The primary server responsible for a zone is called the authoritative name server, and it holds the master copy of the zone file.

DNS zones are crucial for the functioning of the internet, enabling users to access websites and other online resources using human-readable domain names instead of complex IP addresses. When a user enters a domain name into their browser, their computer queries DNS servers to resolve that name to an IP address. This resolution process begins by identifying the authoritative name server for the relevant DNS zone.

The information within a DNS zone is stored in a zone file, which is a text file containing various types of DNS records. The most common record types include A records (mapping a hostname to an IPv4 address), AAAA records (mapping a hostname to an IPv6 address), MX records (specifying mail servers for a domain), and CNAME records (creating aliases for domain names). Managing DNS zones effectively is essential for maintaining the accessibility and integrity of online services.