A Layered Approach to Computer Networks - nptel - Indian Institute ...
A Layered Approach to Computer Networks - nptel - Indian Institute ...
A Layered Approach to Computer Networks - nptel - Indian Institute ...
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<strong>Computer</strong> <strong>Networks</strong> Prof. Hema A Murthy<br />
<strong>Indian</strong> <strong>Institute</strong> of Technology Madras<br />
Layers and their functions<br />
• Physical layer:<br />
– Transmits bits 0 & 1<br />
• what voltage <strong>to</strong> use<br />
• width of a bit<br />
– connection establishment<br />
– tearing down of connection<br />
– number of pins on Network connec<strong>to</strong>r and use<br />
of each pin on the connec<strong>to</strong>r
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