Digital Evolution Slides
CS.UNIT.04.WEB_HISTORY
BANDWIDTH
TIME MACHINE
From Dial-up to 5G: Understanding the invisible pipes of the internet.
WARM UP: THE DATA GUESS
1 Minute Video
Resolution: 240p (2005 quality)
??? MB
1 Minute Video
Resolution: 4K UHD (2024 quality)
??? MB
APRIL 23, 2005
The First Upload
Uploader: Jawed Karim (YouTube Co-founder)
Location: San Diego Zoo
Tech: Compact Digital Camera (No smartphone!)
"Everything was limited. The storage, the bandwidth, the screen resolution. You had to make every pixel count."
me_at_zoo.mov
Embedded media
Duration: 19 seconds
Max Res: 240p
DECODE THE ARTIFACT
Visuals
- Blurry background
- Pixelation on movement
- 4:3 Aspect Ratio (Square)
- No graphics/text overlays
Audio
- Wind noise
- Background chatter
- No background music
- Unscripted speech
Content
- "Slice of life"
- No intro/outro
- No "Like & Subscribe"
- Ends abruptly
THE INVISIBLE LIMIT: BANDWIDTH
2005: THE STRAW ~300 Kbps Upload
Video had to be small to fit through this tiny pipe.
2024: THE FIREHOSE ~50,000 Kbps Upload
We can stream 4K live because the pipe is massive.
ACTIVITY: BANDWIDTH CALCULATION
We are going to travel back in time to see how painful it would be to be a YouTuber in 2005.
Mission Calculate Upload Times
Tools Data Sheet + Math
EXIT TICKET
"Why was the first YouTube video only 19 seconds long?"
Explain using the terms: Bandwidth and File Size.
Bandwidth Data Lab
Bandwidth Data Lab
Comparing Internet Infrastructure: 2005 vs. Today
CS.LAB.04
Name:
Date:
PART 1: NETWORK SPECIFICATIONS
Use the data tables below to answer the calculation problems. Note the difference in units!
<table class="w-full text-sm"><tbody><tr class="border-b border-slate-200"><td class="px-4 py-2 text-slate-500">Era</td><td class="px-4 py-2 text-slate-500">Technology</td><td class="px-4 py-2 text-slate-500 font-mono text-right">Speed (Mbps)</td></tr><tr class="border-b border-slate-200 bg-amber-50/50"><td class="px-4 py-2 font-bold">2005</td><td class="px-4 py-2">DSL / Cable</td><td class="px-4 py-2 font-mono text-right font-bold">0.3 Mbps</td></tr><tr class="bg-green-50/50"><td class="px-4 py-2 font-bold">2024</td><td class="px-4 py-2">Fiber / 5G</td><td class="px-4 py-2 font-mono text-right font-bold">50.0 Mbps</td></tr></tbody></table>
<table class="w-full text-sm"><tbody><tr class="border-b border-slate-200"><td class="px-4 py-2 text-slate-500">Quality</td><td class="px-4 py-2 text-slate-500">Resolution</td><td class="px-4 py-2 text-slate-500 font-mono text-right">Size (MB)</td></tr><tr class="border-b border-slate-200 bg-amber-50/50"><td class="px-4 py-2 font-bold">Low</td><td class="px-4 py-2">240p</td><td class="px-4 py-2 font-mono text-right font-bold">3 MB</td></tr><tr class="border-b border-slate-200"><td class="px-4 py-2 font-bold">HD</td><td class="px-4 py-2">1080p</td><td class="px-4 py-2 font-mono text-right font-bold">25 MB</td></tr><tr class="bg-green-50/50"><td class="px-4 py-2 font-bold">4K</td><td class="px-4 py-2">2160p</td><td class="px-4 py-2 font-mono text-right font-bold">350 MB</td></tr></tbody></table>