Answer:
d. All of the above
Explanation:
Physical layer is the lowest layer of the OSI reference model that deals with the setup of physical connection to the network and with transmission and reception of signals.
Full duplex (FDx) is a bidirectional type of communication system where two end nodes send and receive data signals at the same time, and a single carrier is simultaneously used for dual communication.
To send or receive data, the participating nodes in a Full Duplex system do not have to wait for a free carrier/medium. It employs a medium that has at least two internal channels - one for sending and one for receiving.
Based on the above explanations, options A, B and C are valid and are correct ways to accomplish full-duplex (FDX) digital communications on guided medium at the physical layer (OSI Layer 1). There all of them are correct.
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<span>The part of the computer that provides access to the internet is the "modem".
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A modem refers to a hardware device that enables a PC to send and get information over a phone line or a link or satellite association. On account of transmission over a simple phone line, which was at one time the most prevalent approach to get to the internet, the modem changes over information amongst simple and computerized designs progressively for two-way network communication.
