Activity 1 5 minutes to discuss and feedback on the following: What devices are needed to create a computer network?

Introduction to the Internet & Wide Area Networks

Lesson Objectives Lesson Objectives Review the importance of certain learning habits for success in the lesson Understand the difference between a Local Area Network and a Wide Area Network Understand what the internet actually is Understand how data travels around the internet Success Criteria ALL: Successfully demonstrate an understanding of what the internet is and what data packets are MOST: Successfully explain how data travels around the internet SOME: Be able to explain the various parts of a data packet Literacy – Key Words Data Packets These are created from the splitting up of a file when data is sent acorss the internet. It is reassembled at the receivers’ end to reform the file. LAN A network over a small (local) area (building or site) WAN A network over a large (wide) area (town, country, the world) Internet The largest WAN – A network of networks spanning the world

Learning Habits Important Learning Habits for Success in this Lesson: Noticing details Adapting : Reflecting and making changes Reasoning: Thinking rigorously, methodically and giving explanations. Empathising… …with feelings and views Effective use of time Questioning: Asking questions to get below the surface Listening… …to understand Imagining… …how things could be and seeing a range of possibilities Distilling… …what you have learnt and what you need to learn Collaboration: Working effectively with others Meta Learning: Talking about how you have been learning Imitation: Picking up good habits from others Independence: Working effectively alone Managing distractions… …and sustaining concentration Capitalising: Using resources purposefully Making links… …and recognising relevance Perseverance: Overcoming frustration and difficulty Planning… …your learning in advance

Networking – LANs and WANs What is a Computer Network? Two or more computers connected together to share information and resources. (this can involve physical or wireless connections, or both)

Networking – LANs and WANs What is a LAN? A LAN is a Local Area Network. It is a connected set of computers and other devices. Each device is called a node (e.g. computer, printer, etc.) A LAN is installed on one site. Relatively small It is owned by the organisation So what do you think a WAN might be then?

Difference between a LAN and a WAN Wide Area Network Covers a large geographical area – may be worldwide Devices may be provided by telecoms companies like phone lines and satellites LAN Local Area Network Located on one site Owner of network owns the network devices (cables etc) WAN LAN

The Internet Wide Area Networks What do you think is the biggest WAN on the planet? The Internet

So what is the Internet? The internet is a massive network of networks. A ginormous collection of connected computers.

The amazing connections of the Internet Billions of miles of cables across the land. Undersea cables connecting continents.

Data Packets Data Packet Header Data Transfer Files are split into millions of data packets when sent across a network or the internet. Packets get sent by different routes according to availability. When you send a file online, the parts of the file might travel one way around the world and the other parts may go in the opposite direction! Packets are reassembled at receiving end. Typical packet structure: Data Packet Header Error Check Sequence No. Return Address Destination Address

The amazing way that data is sent across the internet

Your Main Task Today and HOMEWORK Remind yourself of your target level… …based on your target level you must pick an appropriate task. THIS MUST BE UPLOADED ONTO MBC NEXT LESSON! RULES If your target level is a level 4, you can pick any task If your target level is a level 5, you can pick any task – BUT NOT TASK 1 If your target level is a level 6, you can only pick task 3 Choice of tasks on next slides…

Activity 3 Target Level 4 Task Describe what a WAN is, label the ‘data packet truck’ and describe how data is sent across the internet. Explain the difference between a WAN and a LAN, label the ‘data packet truck’, explaining why the ‘packet header’ information is needed and explain how data is sent across the internet. Explain the difference between a WAN and a LAN, label the ‘data packet truck’ explaining why the ‘packet header’ information is needed and explain, with a diagram, how data is sent across the internet. Finally, research why a ‘data packet’ has an error check and how it works. Target Level 5 Task Target Level 6 Task