YEAR 7 A& B - DNS

​Accessing Webpages: DNS

How does the URL link to an IP Address : DNS
DNS (Domain Name System) is a system used to translate a URL into an IP address. This means you don't have to remember the IP addresses for web servers.

​Accessing Webpages: DNS

• Think of it like looking up a friend's phone number in your address book. You might know their name (URL), but you need their phone number (IP address) to call them. DNS helps you find that phone number.

​Accessing Webpages: DNS

• Human-readable addresses: URLs are easy for humans to remember and type.

• Computer-readable addresses: Computers understand IP addresses, which are a series of numbers.

• DNS as the translator: DNS acts as a translator between these two types of addresses. It converts the human-friendly URL into a computer-readable IP address.

​Accessing Webpages: DNS

A DNS server stores a large database of URLs and corresponding IP addresses. It looks up the IP address based on the URL, similar to the example below:

• google.com: 209.85.231.104

• microsoft.com: 207.46.170.123

• yahoo.com: 72.30.2.43

• micropython.org: 176.58.119.26

• dell.com: 143.166.83.38

Question

What happens when you type a URL into your web browser ?
Unit 7.3 - pg 93

Homework

Practise exercise: pg 94, Qn 2