Which of the following layers of the OSI model is responsible for converting data into signals suitable for transmission over a physical medium?
APhysical Layer
BData Link Layer
CNetwork Layer
DTransport Layer
Correct Answer:
A. Physical Layer
Explanation:
The Physical Layer (Layer 1) handles the conversion of data into electrical signals, light pulses, or radio waves for transmission over physical media.
Which of the following best describes encapsulation in the OSI model?
AThe process of removing headers from data as it moves up the OSI layers
BThe process of adding headers and trailers to data as it moves down the OSI layers
CThe process of converting analog signals to digital signals
DThe process of establishing a secure connection between two hosts
Correct Answer:
B. The process of adding headers and trailers to data as it moves down the OSI layers
Explanation:
Encapsulation is the process of adding protocol-specific headers and trailers to data at each layer as it moves down from the Application Layer to the Physical Layer.
