Answer:
A computer is a machine that can be programmed to manipulate symbols.
Explanation:
Following are the features of PC (computer)
Processor
speed
reliability
accuracy
automation
diligence
consistency
Random access memory (RAM)
Operating system
Graphics adapter and video RAM
Monitor
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.
The question is vague, but answer B is absolutely incorrect so by default choice A is correct ... "good" is hard to define and your vision can be corrected by glasses allowing you to drive, etc.
