1. To trial the platform and take tests, please take a few seconds to SIGN UP
and SET UP FREE.
2. Searching for something specific? See our text overview of all tests. Scroll right for levels, and lists.
Join 36000+ teachers and students using TTIO.
DNS Explained
Name servers are used to host and match website addresses to IP addresses. DNS is the main system over the internet that uses the name server.
When you type in a URL, the ISP looks up the domain name, finds the matching IP address and sends it back.
The web browser sends a request straight to that IP address for the page or file that you are looking for.
Every website has a URL with an equivalent IP address.
For example: http://www.teachingcomputing.com/code/python/intro
In this example:
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
www.teachyourselfpython.com