Domain Name System
The Domain Name System (DNS) operates as the "phone book" of the Internet. Because human users rely on memorable domain names while machines require numeric addresses for routing, DNS translates human-friendly names (such as example.com) into numeric IP addresses.
Without DNS resolving domain names to IP addresses, users would need to memorize and enter specific numerical IP addresses for every website or remote service they access.
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Prep Sessions
From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Ch.2 Addressing and Name Resolution - From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Network Addressing and Identifiers - From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Domain Name System (DNS) - From Packets to Protocols: How Modern Networks Transmit Data @ University of Michigan - Ann Arbor
Learn After
What does the Domain Name System (DNS) translate human-friendly domain names into?
The Domain Name System (DNS) operates as the "phone book" of the Internet.
What would users be required to do to access websites and remote services if DNS did not resolve domain names?
Explain why the Domain Name System (DNS) is necessary, describing the distinct needs of human users compared to machines.
What do machines require to route traffic to websites and remote services across the Internet?
Machines rely directly on memorable domain names rather than numeric addresses for routing.
What type of identifier do human users rely on to access websites instead of memorizing numeric addresses?
Discuss why the Domain Name System (DNS) is commonly compared to a "phone book" of the Internet, and describe the practical impact on everyday internet navigation if this service were unavailable.