Exploring the Physical Layer of OSI

What is the primary function of the physical layer in the OSI model?

• Encrypting data

• Routing data

• Transmitting raw bit streams

• Compressing data

Which of the following is a type of physical media used for data transmission?

• HTTP

• Coaxial cable

• TCP/IP

• XML

What does modulation allow in data transmission?

• Decrease in signal frequency

• Conversion of digital signals to analog for transmission

• Increase in data encryption

• Compression of data to reduce size

Which transmission mode is used when data is sent in both directions but not at the same time?

• Simplex

• Full-duplex

• Half-duplex

• Multiplex

What is the bit rate of a channel with a bandwidth of 3000 Hz transmitting a signal with two bits per symbol?

• 1500 bps

• 3000 bps

• 6000 bps

• 12000 bps

Which of the following is NOT a modulation technique?

• Amplitude Modulation (AM)

• Frequency Modulation (FM)

• Phase Modulation (PM)

• Code Modulation (CM)

In the context of the physical layer, what does the term "baseband" refer to?

• A type of broadband connection

• The range of frequencies a channel can carry

• Transmission of a single signal over a channel

• Modulating data signals without changing the carrier frequency

What is the main purpose of error detection at the physical layer?

• To compress data to fit into a smaller bandwidth

• To ensure data integrity by checking for transmission errors

• To encrypt data for secure transmission

• To convert analog signals to digital

Which of the following error detection methods can detect single-bit errors?

• Checksum

• Parity Check

• CRC (Cyclic Redundancy Check)

• All of the above

What is the term for the maximum amount of data that can be transmitted over a network channel?

• Latency

• Throughput

• Bandwidth

• Data density