Networking, DNS Basics
This page contains information for everyday computer users about the campus DNS (Domain Name System) service.
DNS (which stands for Domain Name System) is the system computers use to locate each other across the Internet.
In simplest terms, DNS is like an enormous phone book for translating human-readable computer names (such as www.example.com) into machine-readable IP
address numbers (such as 198.51.100.17 or 2001:db8::17) which your computer can then use to establish a network connection (i.e. place a call) to the other computer.
Domains are collections of computers that belong together. For example, any web page with a domain name ending in .edu belongs to an educational institution. Any web page with a domain name ending in .illinois.edu belongs specifically to the educational institution which is University of Illinois at Urbana-Champaign.
A DNS server is a computer that provides access to this global and constantly-changing phone book. When your computer needs to know the IP address for www.example.com, it asks the DNS server; the DNS server looks up the answer and sends it back to your computer.
In most cases, you won't need to know about DNS servers or change your computer's configuration to access them.
Most modern computers can automatically learn about the campus DNS servers through a service known as DHCP. If you're not having any problems with your network connection, you don't need to change anything.
However, in some cases, you might need to override DHCP's automatic DNS detection and configure your computer to use a specific DNS server.
If a network connection's configuration process asks for DNS server information, and choosing the "automatic" or "DHCP" option doesn't work for you, you can reach the campus DNS servers using the following IPv4 address:
and/or the following IPv6 address: