1.7 Summarize DNS concepts and its components.
The Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource connected to the Internet or a private network. Internet and TCP utilities such as telnet, FTP, and SMTP use DNS to translate computer host and domain names to their corresponding IP addresses. DNS allows you to type recognizable names into your Web browser and your computer will automatically find that address on the Internet. Address information is stored in several locations in a hierarchical structure.
- DNS servers
A DNS server is any computer registered to join the Domain Name System. A DNS server runs special-purpose networking software, features a public IP address, and contains a database of network names and addresses for other Internet hosts.
- DNS records (A, MX, AAAA, CNAME, PTR)
Server Intellect
- Dynamic DNS
Dynamic DNS (DDNS) is an addition to the DNS standard. Dynamic DNS updates a DNS server with new or changed records for IP addresses without the need for human intervention. This allows a fully qualified domain name (FQDN) that never changes to be associated with a dynamically assigned IP address that can change quite often.
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