Week 11 Lesson Spec ref Lesson Lesson content Lesson summary resources 1 5.3.1 The internet Starter: Week 11 Lesson 1 Physical routing and Either: show the network at and ask students to work out the fastest route for a activities DNS packet going from Bristol to London (then as extension, the maximum delay between Visualisation packets sent one unit apart). Recap the notion of IP addressing, packet switching and image of the routers. internet Or: examine a selection of the screen shots of visual trace route hops students have brought in. Discuss with the class what this tells us about the way data travels across the internet. Packets can take different paths to their destination, not always the most direct; if one route is unavailable, data can be routed a different way. Explain what we mean by ‘connecting backbone’ of the internet, i.e. the high speed data routes that connect the routers and the large networks they support. Show the Andrew Blum’s image from the start of the previous lesson again. TED lecture ‘What is the Show Andrew Blum’s TED lecture ‘What is the internet really?’: internet really?’ Questions on the video (Activity 11.1.1). Ask students what the IP address is for the BBC’s website to demonstrate that we work better with names than numbers. Explain that this is the role of the DNS: to match up a user-friendly domain name like ‘edexcel.com’ to an .
Week 11 Lesson Spec ref Lesson summary Lesson content Lesson resources 1 5.3.1 The internet Physical routing and DNS Starter: Either: show the network at and ask students to work out the fastest route for a packet going from Bristol to London (then as extension, the maximum delay between packets sent one unit apart). Recap the notion of IP addressing, packet switching and routers. Or: examine a selection of the screen shots of visual trace route hops students have brought in. Discuss with the class what this tells us about the way data travels across the internet. Packets can take different paths to their destination, not always the most direct; if one route is unavailable, data can be routed a different way. Explain what we mean by ‘connecting backbone’ of the internet, i.e. the high speed data routes that connect the routers and the large networks they support. Show the image from the start of the previous lesson again. Show Andrew Blum’s TED lecture ‘What is the internet really?’: Questions on the video (Activity 11.1.1). Ask students what the IP address is for the BBC’s website to demonstrate that we work better with names than numbers. Explain that this is the role of the DNS: to match up a user-friendly domain name like ‘edexcel.com’ to an . Week 11 Lesson 1 activities Visualisation image of the internet Andrew Blum’s TED lecture ‘What is the internet really?’
gcse-cs-autumn-term-year-11-scheme-of-work.docx