26 lines
1012 B
Markdown
26 lines
1012 B
Markdown
# 1. Physical Layer
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This layer is responsible for the actual physical transfer of data between devices via cables or other mediums using switches, routers, etc..
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This layer also converts the data into a bit-stream of 1's and 0's.
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The signal convention must be the same on both devices. (Meaning of a 0 and a 1)
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## In depth
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Information on computers is stored in a digital format. To transmit this information we have to convert the information to signals.
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Physical layer is responsible for this conversion. The Physical layer deals with the actual physical transmission of electrical signals.
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You could say the physical layer is a bridge between real life and software.
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## Waves
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Waves, like you would see on a lake, or in electrical cables are made when a physical quantity changes in the form of a moving ridge.
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Waves by them self store no real information.
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## Signal
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A signal is a wave that holds information. (wave + data = signal)
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## Encoder
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A encoder converts
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![[Pasted image 20211103214144.png]] |