Thursday, 14 November 2013

The physical layer is responsible for transmitting raw bits over the communication channel. This layer is to ensure how to send a 1 bit from the sending computer as 1 bit to the receiving computer, not as 0 bit. The physical layer also deals with the issue of how many bit per second will be transmitted,
what level of voltage will be used to represent 1 and 0 whether transmission will be unidirectional or bidirectional, how the initial connection be established and terminated at the end , how many pins of network connector has and which pin is for what etc etc. Hence the design issues of the physical layer is mostly mechanical, electrical and procedure oriented.


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