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DNS Server

Stands for Domain Name System
It is the phonebook of the internet

DNS Working#

Check Web Browser & OS Cache for IP Address
Send request to DNS Recursive Resolver (ISP) - Checks own Cache for IP Address
Send request to Root Server - Knows location to Top Level Domain (TLD) Server
Resolver is directed to TLD - Knows location of Authoritative Name Servers
Resolver is directed to Authoritative Name Server - Returns the IP Address of Domain
Resolver (ISP) caches the IP Address - Sends IP to requesting device

We can configure our devices to use a third-party DNS Resolver
If the Autoreactive Name Server returns a CNAME (alias) than the Resolver has to perform the whole process again for the alias

DNS (Domain Name System) - Explained | TechTerms - YouTube

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