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content/notes/network.md
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# Overview
Physical Media
- TP cable
- two wired twisted together surrounded by a shield
- signal and ground reference
- short range (100meters)
- phone, DSL, ethernet lan
- Coaxial
- inner conductor
- insulator
- outer conductor (shield)
- insulator
- plastic cover
- long distance high speed: cable tv ethernet lan
- fibre optic
- light within glass
- high speed low error
# Application Layer
[Application Layer](notes/Application Layer)
# Transport Layer