What is the function of Physical layer in OSI model?

Physical Layer :

  • Physical Layer deals with the functionalities required to transmit a bit stream over a physical medium.
  • Transmission unit isĀ Bits
  • It is responsible for movements of individual bits from one node to the next.
  • It defines the characteristics of the interface between the devices and the transmission media.
  • It defines how the bits are encoded into electrical or optical signals
  • It also controls Data rate and synchronization of bits
  • It also defines the Network Topology and transmission mode.

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