The Physical Layer defines the
electrical, mechanical, procedural, and functional specifications for
activating, maintaining, and deactivating the physical link between
end systems. Such characteristics as voltage levels, timing of voltage
changes, physical data rates, maximum transmission distances, physical
connections and other similar attributes are defined by physical
layer specifications.
Physical Layer standards include:
- 10BASE-T
- 100BASE-TX
- V.35
- RS-232
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