DNS
Domain: Computer Systems
🎯 Motivation
Domain Name System - translates human-readable names (google.com) to IP addresses (142.250.80.46).
📋 Concrete Example
DNS: you type google.com. DNS lookup: google.com -> 142.250.80.46. Your browser connects to that IP. Without DNS, you would need to memorize IP addresses.
🔗 Analogy
DNS is like a phonebook - you look up Alice and find her number 9876-5432. DNS looks up google.com and finds its IP address. You use names; DNS translates to numbers.