Computing · Year 6 · The Global Web and Network Infrastructure · Autumn Term

URLs and IP Addresses

Students learn about Uniform Resource Locators (URLs) and Internet Protocol (IP) addresses and their roles in locating web resources.

• National Curriculum Attainment Targets
• KS2: Computing - Computer Systems and Networks

About This Topic

Uniform Resource Locators, or URLs, provide human-friendly addresses for web pages, such as https://www.bbc.co.uk. Internet Protocol addresses, or IPs, are numerical labels like 104.20.5.67 that devices use to find each other across networks. Year 6 students differentiate these concepts, explain how the Domain Name System translates memorable URLs into precise IPs, and predict difficulties without this translation, such as memorising long numbers for every site.

This content supports KS2 Computing standards on computer systems and networks within the National Curriculum. It develops skills in deconstructing digital addresses, understanding layered internet protocols, and evaluating system efficiencies, which prepare students for safer online navigation and basic cybersecurity awareness.

Abstract networking ideas challenge many students, but active learning bridges the gap. Role-plays of DNS processes and hands-on URL breakdowns make invisible translations visible and interactive. Collaborative predictions about a DNS-free internet spark engagement, solidify causal links, and boost retention through peer explanation.

Key Questions

1. Differentiate between a URL and an IP address and their functions.
2. Explain how the Domain Name System (DNS) helps us access websites easily.
3. Predict what would happen if there were no system to translate URLs to IP addresses.

Learning Objectives

• Compare the structure and function of a URL with an IP address.
• Explain the role of the Domain Name System (DNS) in translating URLs to IP addresses.
• Analyze the consequences of a hypothetical scenario where URLs cannot be translated to IP addresses.
• Identify the components of a URL and describe what each part represents.

Before You Start

Introduction to the Internet

Why: Students need a basic understanding of what the internet is and how devices connect to it before learning about specific addressing systems.

Basic Computer Hardware

Why: Understanding that devices (computers, phones) are connected to a network is foundational to grasping how they are identified and located.

Key Vocabulary

URL	A Uniform Resource Locator, which is a human-readable web address used to find resources on the internet, like a street address for a website.
IP Address	An Internet Protocol address, which is a unique numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication, like a specific house number.
DNS	The Domain Name System, a hierarchical and decentralized naming system for computers, services, or any resource connected to the Internet or a private network, acting as the internet's phonebook.
Domain Name	The human-friendly part of a web address, such as 'bbc.co.uk', which is easier for people to remember than an IP address.

Watch Out for These Misconceptions

Common Misconception

URLs and IP addresses are interchangeable and do the same job.

What to Teach Instead

URLs offer readable paths for humans; IPs provide exact machine locations via DNS translation. Pair dissection activities expose structural differences, while role-plays demonstrate translation failures, helping students build accurate mental models through trial and error.

Common Misconception

Browsers store all URLs without needing DNS every time.

What to Teach Instead

DNS resolves dynamically each session for current IPs. Memory challenges reveal quick forgetting of numbers, and group simulations of repeated lookups clarify ongoing reliance, fostering appreciation for automation via active prediction.

Common Misconception

IP addresses never change, so DNS is unnecessary after first use.

What to Teach Instead

IPs can shift with network changes; DNS ensures updates. Mapping exercises with evolving IPs show adaptation needs, and debates on consequences reinforce system flexibility through collaborative evidence gathering.

Active Learning Ideas

Role-Play: DNS Lookup Chain

Divide class into roles: users with URLs, browsers, DNS servers with IP mappings, and website hosts. Users request sites; chain acts out translation steps aloud. Groups rotate roles twice, noting bottlenecks without DNS. Debrief on real-world parallels.

30 min·Small Groups

URL Dissection Stations

Set up stations with printed URLs from familiar sites. Students identify protocol, domain, path, and parameters in pairs. Record findings on worksheets, then share one insight per pair with class. Extend by visiting safe sites to verify.

25 min·Pairs

IP Memory Match-Up

Provide cards with URLs on one side, IPs on the other for sites like Google or BBC. Pairs match without looking up, then test in browser if possible. Discuss failure rates and DNS necessity as a class.

20 min·Pairs

Prediction Debate: No DNS Scenario

Small groups list top five sites they visit, assign fake IPs, and role-play daily use. Predict frustrations like errors or abandonment. Vote on impacts and connect to DNS benefits in plenary.

35 min·Small Groups

Real-World Connections

• Web developers and network administrators use their understanding of URLs and IP addresses daily to troubleshoot website connectivity issues and manage server configurations for companies like Google or Amazon.
• Internet Service Providers (ISPs) like BT or Virgin Media rely on DNS servers to direct user requests to the correct websites, ensuring smooth internet access for millions of households.
• Cybersecurity analysts investigate network traffic by examining IP addresses to identify malicious activity or unauthorized access attempts on corporate networks.

Assessment Ideas

Quick Check

Present students with a list containing both URLs and IP addresses. Ask them to label each one and write one sentence explaining its primary purpose. For example, 'This is a URL because it's a human-readable address for a website.'

Discussion Prompt

Pose the question: 'Imagine the internet without DNS. What would be the biggest challenge for someone trying to visit their favorite gaming website?' Encourage students to discuss how they would have to find the website and what problems might arise.

Exit Ticket

Provide students with a simple URL, e.g., 'https://www.example.com'. Ask them to break down the URL into its main components (protocol, domain name, top-level domain) and briefly explain what each part does. Then, ask them to write what the equivalent IP address might look like (e.g., a series of numbers).

Frequently Asked Questions

How do I explain URLs versus IP addresses to Year 6 students?

Compare URLs to a street address with house name, easy for people, and IPs to coordinates, precise for GPS. Use familiar sites: show bbc.co.uk as URL, reveal its IP via command line or tool. Follow with group breakdowns of parts like protocol and domain to demystify structure and build confidence in analysis.

What role does DNS play in website access?

DNS acts as a phonebook, converting user-friendly URLs into IP addresses computers need. Without it, users must recall numbers like 142.250.190.14 for Google. Teach via chain role-plays where missing DNS causes chaos, highlighting efficiency and why services like DNS keep the web usable for billions daily.

What happens if there is no DNS system?

Users face memorising complex IPs for every site, leading to errors, frustration, and limited browsing. Sites become inaccessible as IPs change. Prediction activities where students simulate this reveal scalability issues, emphasise human limitations, and underscore DNS as critical infrastructure for modern connectivity.

How can active learning help students grasp URLs and IP addresses?

Active methods like role-playing DNS chains turn abstract translation into tangible steps students enact and debug. URL hunts and IP matching games provide immediate feedback on misconceptions, while predictions engage higher-order thinking. These approaches boost retention by 30-50% over lectures, as peer teaching and movement cement layered concepts in working memory.