Final answer:
The physical layer of the OSI model is responsible for converting digital ones and zeroes into electrical signals and placing them on the cable. It works by processing data signals between different points, from the origination of data within a device all the way to receiving signals at the destination device. The correct option is A)physical layer
Step-by-step explanation:
The layer of the OSI model that converts the ones and zeroes to electrical signals and places these signals on the cable is the physical layer. The OSI model describes the process of sending and receiving data over a network in seven layers, with the physical layer as the first layer (Layer 1). This layer is responsible for the transmission of raw bit streams over a physical medium such as copper wires, fiber optics, or wireless. In terms of signaling between the mentioned points:
A and B: Representation of data as bits within a device before transmission.
B and C: Conversion of the digital bits into electrical, optical, or radio wave signals.
C and D: Transmission of the signals across the physical medium to the receiving end.
D and E: The signals arriving at the destination device's physical receiving interface.
E and A: Conversion back from the signals into digital bits that other layers of the device can process.
The data link layer, network layer, and transport layer handle other aspects of the networking process, such as data framing, logical addressing, and dataflow management, respectively.