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I am searching the content of this topic but I am not sure what should be the content for this topic. This is relate to Computer Network. My topic is Physical layer services & hardware protocols.

What should be content for this topic.

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closed as too broad by Luke Mathieson, Yuval Filmus, David Richerby, Raphael Jan 18 '14 at 12:17

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ I don't understand the question. If you don't know what your topic is, why are you interested in it? If someone told you to look it up, ask them for guidance. $\endgroup$ – Yuval Filmus Jan 18 '14 at 5:03
  • $\begingroup$ I am not getting content for this topic So I am asking this. $\endgroup$ – xrcwrn Jan 18 '14 at 5:06
  • $\begingroup$ Get the relevant buzzwords or introductory references from your teacher; this is not the place to rehash an entire field. $\endgroup$ – Raphael Jan 18 '14 at 12:17
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Just a quick answer:

Hardware protocols are at the lowest level of the Open System Interconnection (OSI) model and are usually a mix of

  • hardware specifications (cables, connectors, signals, ...)
  • how data is exchanged between the hardware devices (start of communication, end of communication, data exchange, flow of control, timings, error handling, ...)

Typical examples of hardware protocols are: serial port RS-232, Parallel port IEEE 1284, USB , Ethernet, bus protocols, ...

Physical layer services are those functions used to correctly implement and manage the communication between devices at the physical layer: e.g. open a port, convert bits to timed signals, change the bit-rate, close a port, send data, multiplexing, flush data, ...

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