Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 20 Aug 2013 09:55:19 -0500

Hi Ganesh,

On 08/20/2013 07:51 AM, Ganesh Jangir wrote:

In which layer(s) of OSI Model the Channel Access(CA) fits?

The TCP and UDP protocols are commonly mapped to layer 4 (Transport),

and Channel Access makes use of both of those protocols. Channel Access

itself implements aspects of both layers 5 (Session) and 6 (Presentation).

> I believe it is network layer. Is this correct??

Layer 3 (Network) is better regarded as the IP Internet Protocol layer

provided by the operating system which sits under the TCP and UDP

protocols. See http://en.wikipedia.org/wiki/OSI_model#Examples for a

useful table.

> In which layer(s) of OSI Model the EPICS fits?

EPICS is a tool-kit; it provides various parts that can be mapped to

layers 5 through 7 depending on how and where you use them.

- Andrew
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System