Physical Layer: Functions and Components

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What is the purpose of a repeater in a network?

Interpret binary data into voltage levels

Increase the distance a digital signal can travel (correct)

Encode digital data into a recognizable format

Convert binary data into digital signals

Which of the following represents the signaling method used over fiber-optic cables?

Light Pulses (correct)

Microwave Signals

Sound Waves

Electrical Signals

What does encoding achieve in the context of digital data transfer?

Transmits data over long distances without attenuation

Converts bits into a recognizable format for the next device (correct)

Decreases the bandwidth of the digital signal

Increases the complexity of digital data

In digital signal encoding, what does Nonreturn to Zero-Level (NRZ-L) refer to?

A way to represent binary digits using voltage levels Signup and view all the answers

What is the primary benefit of using two distinct voltage levels for binary digits in digital transmission?

Improves signal recognition by the next device Signup and view all the answers

What role does a network interface card (NIC) play in physical layer communication?

Facilitates communication between a device and the network Signup and view all the answers

What is the primary purpose of the Physical Layer in a network?

To accept complete frames from the Data Link Layer and transmit them to the local media Signup and view all the answers

Which of the following is NOT considered a Physical Layer component?

Routing and switching devices Signup and view all the answers

What is the role of Encoding in the Physical Layer?

To translate the binary data into electrical, optical, or radio frequency signals Signup and view all the answers

What is the role of Signaling in the Physical Layer?

To define the electrical, optical, or radio frequency characteristics of the transmitted signals Signup and view all the answers

Which of the following is a primary function of a Network Interface Card (NIC) in the Physical Layer?

To convert between digital and analog signals Signup and view all the answers

What is the primary purpose of the physical layer in a data network?

To establish and maintain the physical connection between devices Signup and view all the answers

Which of the following is NOT a characteristic of the physical layer in a data network?

Manages the logical addressing and routing of data packets Signup and view all the answers

What is the primary function of a Network Interface Card (NIC) in a data network?

To establish and maintain the physical connection to the network Signup and view all the answers

Which of the following is a key characteristic of the physical layer's encoding and signaling functions?

It specifies the electrical, mechanical, and functional requirements for the physical connection Signup and view all the answers

What is the primary advantage of using fiber-optic cabling in a data network compared to other physical media?

Fiber-optic cables offer higher data transmission rates and longer distances Signup and view all the answers

Which of the following is the primary function of the signaling mechanism in the physical layer?

To convert the digital data into electrical or optical signals for transmission Signup and view all the answers

Physical Layer: Functions and Components

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