What is an (OSI) Open Systems Interconnection physical layer, and what is its purpose?
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It is a date link layer, some of their main functions that It can work for exchanging frames, controlling media access and performing error detection .
It is the lower layer of the OSI and it is responsible for sending bits from one computer to another.
The main purpose of the physical layer is that it can cover a variety of devices among them cabling, receivers and transceivers.
It is located at lower layer of the OSI system, and it is responsible for transmitting the actual signals across the physical media.
The physical layer works as a way of transport of the data, using the mechanical , electrical or procedural interfaces.