DCN CHAPTER 2 (PART 2)

What is a communication channel?

• A type of computer that processes data

• A method to encode signals

• A pathway through which information is conveyed

• A type of network cable

What does channel capacity represent?

• Number of devices connected to a network

• Distance data can travel

• Maximum bit rate a channel can handle

• Signal power in a receiver

What does Shannon’s Law calculate?

• Power usage in transmission

• Maximum data rate of a noisy channel

• Type of signal encoding

• Total number of network users

According to Shannon's Law, increasing which factor improves channel capacity?

• Packet size

• Bandwidth

• Transmission delay

• Number of devices

What type of data has infinite values within a range?

• Analog

• Binary

• Digital

• Encoded

What is line coding?

• Converting analog to digital signals

• Converting binary data to digital signals

• Encoding voice signals

• Replacing modulated signals

Which line coding method uses only one voltage level?

• Bipolar

• Unipolar

• Manchester

• Differential

In NRZ-Invert (NRZ-I) encoding, what does a voltage inversion represent?

• Bit 0

• Bit 1

• Start bit

• Stop bit

What is the advantage of using Manchester encoding?

• Less power usage

• Uses only one wire

• No signal transitions

• Built-in synchronization

What voltage level represents binary 0 in AMI encoding?

• Positive

• Negative

• Zero

• Alternating