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Protocols: DNS and DHCP This lesson focuses on the following protocols: Domain Name Systems (DNS): this runs over TCP/UDP and allows us to which allows us to resolve fully qualified domain names to IP addresses or IP addresses to fully qualified domain names. DNS allows us to transmit a query to a particular server and find out a specific IP address (such as google.com). Dynamic Host Configuration Protocol (DHCP): This runs over UDP and is what computers use to automatically get IP address information.