In the context of communication systems, what does "SISO" stand for?
Single-Input Single-Output
Single-Input, Multiple-Output
Single-Interference, Single-Output
Single-Interception, Multiple-Output
Answer : A
Explain : SISO stands for Single-Input and Single-Output. It's a radio system where both the transmitter and receiver have one antenna. SISO is typically used in: Radio, Satellite, GSM, CDMA
In wireless communication, which mode allows a device to both transmit and receive signals, but not simultaneously?
Simplex mode
Half-duplex mode
Full-duplex mode
Multiplex mode
Answer : B
Explain : Half-duplex communication is a method of communication where both parties can communicate with each other, but not simultaneously. This means that only one party can transmit data at a time, while the other party must wait until the transmission is complete before sending their own data.
In wired Ethernet communication, what is the standard mode for data transmission, where data can be sent and received simultaneously?
Simplex mode
Half-duplex mode
Full-duplex mode
Multiplex mode
Answer : C
Explain : Full-duplex communication is a communication strategy where two devices can transmit data in both directions at the same time. This means that both devices can transmit and receive data simultaneously.
Which of the following is considered a guided medium for data transmission ?
Fiber optic cable
Radio waves
Microwave
Infrared
Answer : A
Explain :Guided media is a physical medium that transmits signals from one device to another. It's also known as wired communictaion. Examples of guided media include Twisted-pair cables, Coaxial cables and Fiber-optic cables.
Which layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model
application
transport
Internet
Network Access
Answer : B
Explain : But, if in option host to host layer then this is correct option.Host to Host layer is the TCP/IP stack equivalent of the transport layer of the OSI model. The four layers of the TCP/IP stack (also called the DoD model) are Application/process, Host-to-Host, Internet, and Network Access.
At which layer of OSI model, router works
Transport
Session
Datalink
Network
Answer : D
Explain : OSI Layer 3. Layer 3 is the network layer. This is where we send information between and across networks through the use of routers.
Which of the following communication medium supports highest data rate?
Optical fiber
Wifi
Ethernet
Bluetooth
Answer : A
Explain : Optical fiber has the highest data rate of any communication medium. Optical fiber uses light signals to transmit data, which allows for extremely fast transmission speeds.
Which layer in the TCP/IP stack is equivalent to the Datalink layer of the OSI model
Application
host to host
Internet
Network Interface
Answer : D
Radio waves are
Omnidirectional
Unidirectional
Bidirectional
None of these
Answer : A
Explain : Radio waves are omnidirectional, meaning they can travel in all directions. They are widely used for communication both indoors and outdoors because they can penetrate through walls easily.
Which type of the signal is used for satellite or wireless LAN communication
Radio wave
Microwave
Infrared
None of these
Answer : A
Explain : Radio waves are used to communicate with satellites. Radio waves are a type of electromagnetic radiation that travel at the speed of light in a vacuum. They can travel long distances in all directions and can pass through any obstacles.
The basic categorization of transmission media is
Guided and unguided
Determinate and indeterminate
Fixed and unfixed
None of these
Answer : A
Explain : Guided media is also known as wired communication or bounded transmission media. Unguided media is also known as wireless communication or unbounded transmission media.
In communication satellite multiple repeaters are generally known as
Modulators
Earth Stations
Transponders
None of these
Answer : C
Explain : Multiple repeaters in communication satellites are known as transponders. A transponder is a wireless communications device that receives and transmits radio signals at a prescribed frequency range. It receives a signal, amplifies it, and retransmits it back to the earth.
Which of the following device perform modulation and demodulation?
Switch
modulator
Modem
None of these
Answer : C
Explain : A modem is an equipment that performs both modulation and demodulation.
. Bits at physical layer are converted to frames at ________ layer of OSI model
Application layer
Network layer
Data link layer
Transport layer
Answer : C
Explain : First the physical layer will convert the bitstream from 1s and 0s into frames that get passed to the data link layer.
___________ type of fiber cable suffers from high signal dispersion.
Single mode
Multimode
None of these
both of these
Answer : B
Explain : Multimode fiber optic cable suffers from high signal dispersion. This type of fiber can support up to 17 modes of light at a time, which causes modal dispersion.