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Level

Advanced (A Level)

Topic

9 - Networks

Test

05 - DNS

DNS

The Domain Name System (DNS) is the phonebook of the Internet. Humans access information online through domain names, like nytimes.com or espn.com. Web browsers interact through Internet Protocol (IP) addresses. DNS translates domain names to IP addresses so browsers can load Internet resources.

Each device connected to the Internet has a unique IP address which other machines use to find the device. DNS servers eliminate the need for humans to memorize IP addresses such as 192.168.1.1 (in IPv4), or more complex newer alphanumeric IP addresses such as 2400:cb00:2048:1::c629:d7a2 (in IPv6).

DNS Explained

IP Addresses

Discussion

Read this article. https://en.wikipedia.org/wiki/IPv4_address_exhaustion

What are your thoughts on the future of IP addresses? Can you think of an alternative solution to the one that has been proposed? https://tech.slashdot.org/story/14/02/17/1319204/whatever-happened-to-the-ipv4-address-crisis

Additional Reading and Resources

https://en.wikipedia.org/wiki/Domain_Name_System

https://en.wikipedia.org/wiki/MX_record

Find your own IP address

www.teachyourselfpython.com