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 ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Computer</strong> <strong>Networks</strong> Prof. Hema A Murthy<br />
<strong>Indian</strong> <strong>Institute</strong> of Technology Madras<br />
Interfaces and Services<br />
• SDU transmitted across Network<br />
• Control useful for lower layer <strong>to</strong> do their job<br />
• e.g. number of bytes<br />
• Layer n fragments data in<strong>to</strong> PDUs (Pro<strong>to</strong>col<br />
Data Unit – packets)<br />
– each PDU has a header.<br />
• PDUs are used by peers <strong>to</strong> carry out peer control.
Change language