IP addresses and domain names in Intro to Computing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an IP address?

An IP address is a unique set of numbers assigned to each device connected to the internet. It works like a home address, telling other devices where to send information.

beginner

What is a domain name?

A domain name is a human-friendly name that points to an IP address. It is like a nickname or label for a website, making it easier to remember than numbers.

intermediate

How do IP addresses and domain names work together?

When you type a domain name in a browser, a system called DNS translates it into the IP address of the website's server, so your device can connect to the right place.

intermediate

What is the difference between IPv4 and IPv6?

IPv4 uses 4 sets of numbers (like 192.168.1.1) and has about 4 billion addresses. IPv6 uses 8 groups of letters and numbers (like 2001:0db8::1) and can create many more addresses for more devices.

beginner

Why do we need domain names instead of just using IP addresses?

Domain names are easier to remember and type than long numbers. They also allow websites to change their IP addresses without confusing users.

What does an IP address do?

A Identifies a device on the internet

B Stores website content

C Creates domain names

D Blocks internet access

An IP address uniquely identifies a device on the internet, like a home address.

What is the main purpose of a domain name?

A To translate IP addresses into numbers

B To make website addresses easier to remember

C To assign IP addresses to devices

D To speed up internet connection

Domain names make website addresses easier to remember than numeric IP addresses.

Which system translates domain names into IP addresses?

A HTTP

B FTP

C DNS

D SMTP

DNS (Domain Name System) translates domain names into IP addresses.

Which IP version uses 8 groups of letters and numbers?

A IPv4

B IPv3

C IPv5

D IPv6

IPv6 uses 8 groups of letters and numbers to provide many more addresses.

Why might a website change its IP address but keep the same domain name?

A To keep the website accessible without changing the address users type

B To improve security

C To confuse users

D To slow down the website

Changing the IP address but keeping the domain name lets users find the website easily without updating the address.

Explain how a domain name helps you visit a website instead of using an IP address.

Think about how you find a friend's house using a name instead of a number.

Describe the difference between IPv4 and IPv6 addresses and why IPv6 is important.

Consider how many devices need internet addresses today compared to the past.