• Domain names on the internet point to a public IP address
• For instance, rk0.xyz -> 159.65.216.232
• This uses a system called DNS
• When you buy a domain name and set up servers, somebody needs to "resolve" the domain
• Private networks can still have their own private DNS
• localhost is a domain name that generally points to 127.0.0.1
• It is specific to your machine (loopback)

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