Question
Like 10 Base 5, 10 Base 2 is a ________ topology LAN.
- Ring
- Mesh
- Star
- Bus
Question
Which of the following sublyer resolves the contention for the shared media.
- MAC
- LLC
- Physical
- None of the given.
Question
YMODEM has ________ Byte of data unit.
- 1024
- 256
- 128
- 512
Question
BSC supports ___________ transmission using ___________ flow control.
- Full-duplex, Stop and wait ARQ
- Half-duplex, Selective reject ARQ
- Full-duplex, Selective reject ARQ
- Half-duplex, Stop and wait ARQ
Question
If the window size is 63 in go-back N ARQ then what is the range of sequence number?
- 0 to 63
- 0 to 64
- 1 to 63
- 1 to 64
Question
In selective-reject ARQ, only the specific damaged or lost frame is ________.
- Retransmitted
- Forwarded
- Selected
- Rejected
Question
In line discipline after the data transmission, the sending system finishes with an ________ frame.
- EOT
- EKT
- ENT
- ESP
Question
Which error detection method uses one's complement arithmetic.
- Cyclic Redundancy Check (CRC)
- Longitudinal Red Check (LRC)
- Checksum
- Simple Parity Check
Question
In CRC there is no error if the remainder at the receiver is _______.
- Equal to the remainder at the sender
- Zero
- Nonzero
- The quotient at the sender
Question
Which error detection method consists of a parity bit for each unit as well as an entire data unit of parity bits?
- Checksum
- Cyclic Redundancy Check (CRC)
- Longitudinal Red Check (LRC)
- Vertical Redundancy Check (VRC)
Question
At the CRC checker, ___________ means that the data unit is damaged.
- A string of 0s
- A string of 1s
- A string of alternating 1s and 0s
- A nonzero remainder
Question
At the CRC generator, ___________ added to the data unit before the divisional process.
- 0s are
- 1s are
- a polynomial is
- a CRC remainder is
Question
The term _______means that only one bit of a given data unit is changed from 1 to 0 or from 0 to 1.
- Packet Error
- Burst Error
- Single Bit Error
- Character Error
Question
Which of the following consist of just one redundant bit per data unit?
- Two dimentional Parity check.
- CRC
- Simple Parity Check
- Checksum
Question
Asynchronous TDM is efficient only when the size of the time slot is kept relatively ___________.
- Large
- Small
- Medium
- Zero
Question
In Synchronous TDM, Time slots are not same in number as input devices.
- True
- False
Question
WDM stands for _________.
- Wave Division Multiplexing
- Wrong Division Multiplexing
- Well Division Multiplexing
- West Division Multiplexing
Question
dB is negative if a signal is ___________.
- Attenuated
- Distorted
- Amplified
- Noisy
Question
A broadcast signal is received by the orbiting satellites which rebroadcasts ___________.
- to the resender
- to the sender
- to the atmosphere
- none of the given
Question
In _________, a signal is directed straight from antenna to antenna.
- Line of sight propagation
- Ground propagation
- Space propagation
- Tropospheric propagation
Question
Radio wave transmission utilizes ___________ different types of propagation.
- Two
- Three
- Four
- Five
Question
TROPOSHERE is the layer of atmosphere above the troposhere but below space
- True
- False
Question
STP is more expensive than UTP and is less susceptible to noise.
- True
- False
Question
There are __________types of guided media.
- 2
- 3
- 4
- 5
Question
Data is transmitted using light through a ___________ cable.
- twisted pair
- fiber-optic
- coaxial
- microwave
Question
A ___________ modem is used to connect two DTEs directly.
- 'NULL
- Cable
- DSL
- None of the given
Question
Terminal, microprocessor, computer, printer or any other device that generates or consumes digital data is known as ___________
- DCE
- DTE
- DCE & DTE
- None of the given
Question
The __________ generates the data and passes it along with any control information to a __________.
- DTE, DCE
- DCE, DTE
- DTE, DTE
- DCE, DCE
Question
There are _________ types of serial transmission.
- 3
- 4
- 2
- None of the given
Question
Asynchronous transmission is ___________.
- Slow
- Fast
- Costly
- None effective
Question
AM signal requires ___________ the BW of original signal
- Twice
- Half
- Same
- Three Times
Question
Analog To Analog Conversion Methods include ___________.
- AM, PM and FM
- AM, FSK and PM
- AM, PM and QAM
- None of the given
Question
In ________, both peak amplitude and frequency remains constant as the phase changes.
- PSK
- QAM
- Both PSK & QAM
- None of the given
Question
PSK is susceptible to the noise degradation.
- True
- False
Question
Which of the following is most affected by noise?
- PSK
- ASK
- FSK
- QAM
Question
Baud rate is greater than or equal to the bit rate.
- True
- False
Question
In analog transmission, the base signal is called the________.
- Carrier Signal
- Analog signal
- Digital signal
- Modulated signal
Question
In ASK, Noise usually affects the ________.
- Amplitude
- Phase
- Sample
- Frequency
Question
In ASK, both ______ and ________ remain constant.
- Amplitude, Frequency
- Amplitude, phase
- Frequency, Phase
- Amplitude, Samples
Question
Following characteristics fully describe ___________,
Amplitude
Period/Frequency
Phase
- Sine Waves
- Digital Signals
- Aperiodic Signals
- None of the given
Question
Which of the following statement is correct?
- Digital signals are less prone to Noise
- Digital signals are highly prone to Noise
- Analog Signals are less prone to Noise
- Digital signals are not affected by Noise
Question
Quantization is a method of assigning ________ values in a specific range to sampled instances.
- Negative
- Positive
- Binary
- Integral
Question
Sampling means measuring ____________ of signal at equal intervals
- Amplitudes
- Frequencies
- Phases
- None of the given
Question
In the encoding where positive to negative transition is one and vice versa is zero.
- Manchester
- Differential Manchester
- All of the given
- None of given
Question
Encoding digital data into digital signals is called ___________.
- Analog-to-Digital Conversion
- Digital-to-Digital Conversion
- Digital-to-Analog Conversion
- None of the given
Question
RZ stands for ___________.
- Return to Z
- Retire a Zero
- Return ot Zero
- None of the given
Question
Digitizing an Analog Signal is called ___________.
- Analog-to-Digital Conversion
- Digital-to-Digital Conversion
- Digital-to-Analog Conversion
- None of the given
Question
The level of signal is always positive in NRZ encoding.
- true
- false
Question
The inversion of the level represents a 1 bit in ______ encoding
- NRZ-I
- NRZ-L
- RZ
- Manchester
Question
___________ encoding is almost obsolete today
- Bipolar
- Unipolar
- Polar
- None of the given
Question
Radio is an example of _______ signal conversion.
- Analog to analog
- Analog to digital
- Digital to Digital
- Digital to analog
Question
The inversion of the level at 1 bit is called as ________.
- NRZ-L
- NRZ-I
- RZ
- None of the given.
Question
What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 300, 600, 900 and 1200?
- 100
- 900
- 300
- 600
Question
___________ of a signal is the collection of all the component frequencies it contains.
- Time domain
- Frequency domain
- Frequency spectrum
- None of the given
Question
What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 200, 400, 600 and 800?
- 100
- 500
- 300
- 600
Question
What is the period of a Sine wave having frequency of 10 Hz?
- 0.2
- 0.1
- 0.5
- 0.3
Question
What is the period of a Sine wave having frequency of 5 Hz?
- 0.2
- 0.1
- 0.5
- 0.3
Question
What is the frequency of a sine wave if it completes one cycle in 2 seconds?
- 0.5
- 0.6
- 0.3
- 0.2
Question
What is the period of a Sine wave having frequency of 2 Hz?
- 0.2
- 0.1
- 0.5
- 0.3
Question
Time domain shows changes in ___________.
- time w.r.t signal amplitude
- signal amplitude w.r.t time
- time
- All of the given
Question
Time domain plot show changes in signal phase with respect to time.
- true
- false
Question
What is the frequency of a sine wave if it completes one cycle in 5 seconds?
- 0.5
- 0.6
- 0.3
- 0.2
Question
Digital signals are refered to be ___________.
- Continuous
- Discrete
- All of the given
- None of the given
Question
Human voice is example of ___________ signal.
- Digital
- Analog
- Discrete
- None of the given
Question
Analog refers to something that is continuous in ___________.
- Time
- Space
- Frequency
- None of the given
Question
A sine wave is ___________.
- periodic and discrete
- aperiodic and discrete
- periodic and continuous
- aperiodic and continuous
Question
___________ is the rate of change with respect to time.
- Voltage
- Time
- Frequency
- Amplitude
Question
Analog signals are refers to be ___________
- Continuous
- Discrete
- Periodic
- Aperiodic
Question
A sine wave is defined by ___________ characteristics.
- 2
- 3
- 4
- 5
Question
Each computer on the Internet has a unique numeric address called a(n) ___________.
- domain address
- protocol address
- IP address
- Web address
Question
Like Data link layer, ___________ is also responsible for Flow control.
- Transport Layer
- Session Layer
Question
Which layer is concerned with the syntax and semantics of info exchange between two systems?
- Physical
- Application
- Session
- Presentation
Question
Session layer is responsible for _________.
- Reassembly of data
- Maintaining the connection
Question
Which level of the TCP/IP reference model routes data/information across a network channel?
- Application Layer
- Data Link Layer
- Transport Layer
- Network Layer
Question
Which one is not the function of data link layer?
- Line discipline
- Flow control
- Error control
- Network control
Question
Flow control is needed to prevent ________.
- Bit errors
- Overflow of the sender buffer
- Overflow of the receiver buffer
- Collision between sender and receiver
Question
In OSI model headers are added at layer _________.
- 1,2,3 only
- 6,5,7 only
- 5,4,3 only
- 6,5,4,3,2 only
Question
The Internet is ___________.
- software for sending e-mail around the world
- a government-owned agency that links computers
- a global network of computers networks
- a specialised form of local area network
Question
In ___________ a dedicated communication path is established between two stations through the nodes of the network
- Circuit switching
- Packet switching
Question
Traditionally MANs have been implemented using one of the 2 technologies, Circuit Switching and Packet Switching
- true
- false
Question
Central Hub in a Tree is an ___________.
- Active hub
- passive hub
Question
___________ contains a repeater.
- Active hub
- Passive hub
Question
There are three types of Hubs that exist. Which of the following options correctly describes these three?
- Passive, dormant, special
- Active , dormant , passive
- Passive, Active, Turbo
- Passive, Active, Intelligent
Question
A portion of the path that carries TX between a given pair of devices is known as ___________.
- Direct Point
- Bridge
- Channel
- Access Point
Question
Line Configuration refers to the way two or more devices attach to a ___________.
- Path
- Circuit
- Link
- Router
Question
If users must take turns using the link, then it is called Spatial Sharing.
- true
- false
Question
By using ___________ system, change in the file contents during file transmission can be avoided.
- Routing
- Flow Control
- Error Detection and Correction
- Congestion Control
Question
To make sure that source does not overwhelm destination by sending data faster than it can be handled and processed is called?
- Addressing & Routing
- Exchange Management
- Flow Control
- Recovery
Question
The transmission medium that carries the message is referred to as the ___________.
- send and receive device
- communication channel
- protocol
- gateways
Question
Two or more computers connected so that they can communicate with each other and share information is called a ___________.
- satellite
- protocol
- broadcast
- network
Question
Is there any difference between Data communication and telecommunication are network?
- Yes
- No