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The physical layer is concerned with ___________

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The physical layer is concerned with ___________

(a) bit-by-bit delivery

(b) process to process delivery

(c) application to application delivery

(d) port to port delivery

I got this question in an online interview.

The query is from Physical Layer in chapter OSI Model of Computer Network

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Right option is (a) bit-by-bit delivery

To explain: Physical layer deals with bit to bit delivery in networking. The data unit in the physical layer is bits. Process to process delivery or the port to port delivery is dealt in the transport layer. The various transmission mediums aid the physical layer in performing its functions.

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