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Physical Layer Quiz - OSI Model

1.
Which layer is the first layer of the OSI model?
Physical layer of OSI model
Second layer of OSI model
Application layer
Transport layer
The Physical layer is the first layer of the OSI model.
2.
What is the Protocol Data Unit (PDU) for the Physical layer?
Bits
Frames
Packets
Segments
The PDU for the Physical layer is Bits.
3.
What does the Physical layer create for data transmission?
Physical circuits
Logical paths
Application services
Session tokens
The Physical layer creates physical circuits or paths for transmission.
4.
What are the two types of signals handled by the Physical layer?
Modulation and demodulation
Encryption and decryption
Routing and switching
Framing and segmentation
Physical layer signals include modulation and demodulation.
5.
Which types of signals are used in the Physical layer?
Electrical and Optical
Logical and Virtual
Frames and Packets
Analog only
The Physical layer uses electrical (digital/analog) and optical signals.
6.
Physical layer media are divided into which two types?
Guided and Unguided
Wired and Wireless only
Digital and Analog
Local and Remote
Physical layer media are divided into guided (wired) and unguided (wireless).
7.
Which types of copper guided media are used in the Physical layer?
Twisted Pair and Coaxial
Fiber Optic and Microwave
Radio and Infrared
Ethernet only
Copper guided media includes Twisted Pair and Coaxial cables.
8.
Which guided media uses light signals?
Fiber Optic
Twisted Pair
Coaxial
Radio Transmission
Fiber Optic cables use light signals to transmit data.
9.
Fiber Optic cables are divided into which modes?
Mono-mode and Multi-mode
Twisted and Coaxial
Digital and Analog
Guided and Unguided
Fiber Optic media can be mono-mode or multi-mode.
10.
Which types of unguided media exist in the Physical layer?
Radio, Microwave, Infrared
Twisted Pair, Coaxial
Fiber Optic only
Ethernet cables
Unguided media includes wireless radio, microwave, and infrared transmission.
11.
What is the main responsibility of the Physical layer?
Sending raw bits over physical medium
Encrypting data
Routing packets
Session management
The Physical layer sends raw data as bits over a physical medium.
12.
Which of the following does the Physical layer transmit?
Bits only
Frames
Packets
Messages
Physical layer transmits raw bits, not higher-level data structures.
13.
Guided media can be made of which materials?
Copper and Glass
Plastic and Rubber
Air and Vacuum
Metal and Water
Copper (twisted pair/coaxial) and glass (fiber optic) are common guided media.
14.
Which guided medium is commonly used in LAN wiring?
Twisted Pair
Fiber Optic
Coaxial
Infrared
Twisted Pair cables are commonly used in LAN networks.
15.
What type of signal is used in fiber optic cables?
Light
Electrical
Radio
Microwave
Fiber optic cables use light signals for data transmission.
16.
Unguided media is also known as?
Wireless
Wired
Fiber
Copper
Unguided media refers to wireless transmission.
17.
Which type of unguided media uses high-frequency signals for long-distance transmission?
Microwave
Radio
Infrared
Twisted Pair
Microwave signals are used for long-distance wireless communication.
18.
Which unguided medium is used for short-range communication like remote controls?
Infrared
Radio
Microwave
Coaxial
Infrared signals are used in short-range devices like remotes.
19.
The Physical layer is responsible for transmitting what type of data?
Raw data
Frames
Packets
Segments
Physical layer sends raw bits/data over the physical medium.
20.
The Physical layer can create which of the following for data transmission?
Multiple physical paths
Single logical path only
Encrypted tunnels
Virtual sessions
Physical layer can establish multiple physical circuits/paths for data transmission.
1.
What is the Protocol Data Unit (PDU) of the Physical Layer?
Bits
Frames
Packets
Segments
The Physical Layer sends raw data as bits over a physical medium.
2.
Which layer is the Physical Layer in the OSI model?
First layer of OSI model
Second layer
Third layer
Fourth layer
The Physical Layer is the first layer of the OSI model.
3.
Which types of media are used in the Physical Layer?
Guided and Unguided Media
Logical Media only
Wireless Media only
Digital Media only
The Physical Layer uses both guided (wired) and unguided (wireless) media.
4.
What types of signals are transmitted at the Physical Layer?
Electrical and Optical
Magnetic and Mechanical
Radio only
Digital only
The Physical Layer uses electrical (digital/analog) and optical (light) signals.
5.
What is the main responsibility of the Physical Layer?
Send raw data as bits
Routing packets
Error detection
Session management
Physical Layer transmits raw bits over a physical medium.
6.
Name common guided media types used in the Physical Layer.
Twisted Pair, Coaxial, Fiber Optic
Radio, Microwave, Infrared
TCP, UDP, IP
Frame, Packet, Segment
Guided media includes Twisted Pair, Coaxial cables, and Fiber Optic.
7.
Which media type uses wireless signals like radio or infrared?
Unguided Media
Guided Media
Logical Media
Digital Media
Unguided media is wireless: radio, microwave, infrared transmissions.
8.
Which two processes are associated with Physical Layer signals?
Modulation and Demodulation
Encryption and Decryption
Routing and Switching
Fragmentation and Reassembly
Physical Layer signals involve modulation and demodulation.
9.
Which signal type is used in fiber optic communication?
Light signal
Electrical signal
Radio signal
Microwave signal
Fiber optic communication uses light signals (optical).
10.
Explain the main function of the Physical Layer in one line.
Raw data transfer over physical medium
Encrypt data for security
Error correction in transmission
Packet routing between networks
Physical Layer transmits raw bits over physical media.

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