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The portion of physical layer that interfaces with the media access control sublayer is called ___________

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The portion of physical layer that interfaces with the media access control sublayer is called ___________

(a) physical signalling sublayer

(b) physical data sublayer

(c) physical address sublayer

(d) physical transport sublayer

I got this question in final exam.

Enquiry is from Physical Layer in section OSI Model of Computer Network

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Right choice is (a) physical signalling sublayer

Explanation: The portion of physical layer that interfaces with the medium access control sublayer is Physical Signaling Sublayer. The main function of this layer is character encoding, reception, decoding and performs optional isolation functions. It handles which media connection the signal should be forwarded to physically.

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