From cb0a365c25cfb60f5c7c073232e5c6bef9fc9064 Mon Sep 17 00:00:00 2001 From: Trygve Laugstøl Date: Sun, 10 Jun 2018 15:07:17 +0200 Subject: o Removing old stuff. --- slides/presentation-reveal.html | 172 ---------------------------------------- 1 file changed, 172 deletions(-) delete mode 100644 slides/presentation-reveal.html (limited to 'slides/presentation-reveal.html') diff --git a/slides/presentation-reveal.html b/slides/presentation-reveal.html deleted file mode 100644 index bb1f692..0000000 --- a/slides/presentation-reveal.html +++ /dev/null @@ -1,172 +0,0 @@ - - - - - - - IoT Workshop - - - - - - - - - - - - -
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IoT Workshop

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Trygve Laugstøl <trygvis@trygvis.io>

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What is IoT

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What is IoT

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  • Not “a computer connected to the internet” -
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    • Then it is really just another computer connected to the internet
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  • Must be something else -
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    • It is simply devices that are resource constrained -
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      • Usually in more than one way
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  • Autonomous operation, the connection might not be permanent
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What differentiates a computer from an IoT device?

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  • Constrained in (one or more of): -
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    • Memory
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    • CPU
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    • Network bandwidth and/or latency
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    • Storage
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Going back to basics

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What is the internet again?

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OSI model

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  1. Physical Layer
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  2. Data Link Layer
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  3. Network Layer
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  4. Transport Layer
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  5. Session Layer
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  6. Presentation Layer
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  7. Application Layer
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Layer 1: Physical Layer

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  • 10BASE5, 10BASE2
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  • 10BASE-T / 100BASE-TX / 1000BASE-TX
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  • 802.11a/b/g/n PHY
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  • RS-232
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Layer 3: Network Layer

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  • IP
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  • ICMP
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  • IPX
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Layer 4: Transport Layer

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  • TCP
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  • UDP
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Layer 5: Session Layer

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  • “sockets”
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  • NetBIOS
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Layer 6: Presentation Layer

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  • SSL
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Layer 7: Application Layer

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  • HTTP
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  • DNS
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  • (everything else..)
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  • MQTT
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Notes

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Assignments

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  • Measure round trip time/latency. Measure UDP, TCP. Measure when the packet size is greater than the MTU
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