Dns

How does the DNS server work?

• The user types the address of a website in the browser, e.g. https://example.com
• The browser sends a DNS query to the DNS server asking it to return the IP addresses for the selected example.com (domain’s tld nameserver)
• The DNS server in response returns the IP addresses of the server to which the indicated domain is assigned.
• The browser connects to the server with the specified IP address requesting to display the page for the domain https://example.com

DNS lookup process can is divided into separate DNS queries a recursive DNS server acts on behalf of the end host (a laptop, server, etc.) to find the IP address of a domain name that is not authoritative and return this information to the requesting end host. An authoritative DNS server user types an address into a web browser, or an application calls out to a given name of a resource on the Internet.

What does a DNS record consist of and what types of records there is?

DNS data is: Name and subdomain, Type of the records, Time to Live, Priority, and Value - define the value of a specific record. The most important types of DNS records are:

• A (Address) record 32-bit and 128 - bit
• CNAME - Canonical Name
• MX - Mail exchange record used to exchange and redirect email traffic.
• NS - Name Server address of the DNS server
• SOA - State of Authority - top level domain server
• TXT - text record - often used to verify ownership of a domain in Google applications.