Multiple Choice Questions (MCQs)
What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 300, 600, 900 and 1200?
A ________ modem is used to connect two DTEs directly.
________ is responsible for governing node to node communication.
If users must take turns using the link, then it is called Spatial Sharing.
Data Link layer provides services to the ________ layer.
Data is transmitted using light through a ___________ cable.
WDM stands for _________.
Low pass channel has ________ bandwidth between two stations.
In ___________ a dedicated communication path is established between two stations through the nodes of the network
In the ________ method, the stations in a network are orgamized in a logical ring.
There are __________types of guided media.
________ signal can take infinite levels of intensity over time.
Switch is a network device which operates on the ________ layer of the TCP/IP protocol suite.
The logical connection between the peer layers is ________ connection.
In line discipline after the data transmission, the sending system finishes with an ________ frame.
The term _______means that only one bit of a given data unit is changed from 1 to 0 or from 0 to 1.
Which level of the TCP/IP reference model routes data/information across a network channel?
Time domain plot show changes in signal phase with respect to time.
Congestion Control is a feature of layer(s).
Line Configuration refers to the way two or more devices attach to a ___________.
In Pure ALOHA, the vulnerable time is ________ the frame transmission time.
Asynchronous transmission is ___________.
In ________, each station is allocated a time slot during which it can send data.
In Pulse Code Modulation (PCM), the sampling is dependent on ________.
The transmission medium that carries the message is referred to as the ___________.
Signals travel through fiber optic cable are in the form of ________.
There are three types of Hubs that exist. Which of the following options correctly describes these three?
A sine wave is ___________.
The message 1110 sent by a source is received by a destination as 1011. This is ________ type of error.
In Block coding scheme, number of code words is always ________ data words.
The flag in PPP is a byte that needs to be ________ whenever it appears in the data section of the frame.
The original Ethernet technology with the data rate of 10 Mbps is called ________?
At the CRC checker, ___________ means that the data unit is damaged.
S-frames in High-Level Data Link Control (HDLC) are only used to transfer ________ information.
PSK is susceptible to the noise degradation.
The inversion of the level at 1 bit is called as ________.
Which of the following statement is correct?
Like 10 Base 5, 10 Base 2 is a ________ topology LAN.
If a digital signal has "L" number of levels. ________ is the number of bits required to represent each level.
The __________ generates the data and passes it along with any control information to a __________.
The extra bits added with the original data for error detection/correction are called ________.
If duration of noise is decreased during a transmission over noisy channel, fixed data rate of the channel will cause ________ number of bits being impacted by the noise.
________ of a signal is the collection of all the component frequencies it contains.
In selective-reject ARQ, only the specific damaged or lost frame is ________.
VCI address is ________ address in virtual circuit approach.
Which one of the following is a correct-access method?
We can have ________ different groups with a 4 bit block.
What is the period of a Sine wave having frequency of 10 Hz?
The ________ protocol uses both flow and error control.
In ASK, Noise usually affects the ________.
Flow control is needed to prevent ________.
Analog refers to something that is continuous in ___________.
________ category of coaxial cable is used for Cable TV.
Which of the following consist of just one redundant bit per data unit?
In frequency shift keying, ________ remain(s) constant.
What is the frequency of a sine wave if it completes one cycle in 2 seconds?
The inversion of the level represents a 1 bit in ______ encoding
In TCP/IP protocol suite, the process of adding header at each layer on sending side is known as ________.
In CRC there is no error if the remainder at the receiver is _______.
A portion of the path that carries TX between a given pair of devices is known as ___________.
Which one of the following is not a Channelization Protocol?
What is the period of a Sine wave having frequency of 5 Hz?
To make sure that source does not overwhelm destination by sending data faster than it can be handled and processed is called?
________ transmission technology (based on Ethernet) provides a data rate of 1 billion bits per second.
________ is the process of converting digital data to digital signals.
In ASK correct formula for calculating the bandwidth ia as ________.
WDM stands for ________.
What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 200, 400, 600 and 800?
In which controlled-access method all data exchanges must be made through primary device even when the ultimate destination is a secondary device?
DLC in Data Link Layer stands for ________.
Which error detection method consists of a parity bit for each unit as well as an entire data unit of parity bits?
________ contains a repeater.
Which one is not the function of data link layer?
Which one of the following is a Random-Access protocol?
If the window size is 63 in go-back N ARQ then what is the range of sequence number?
Normally the value of Kmax in pure ALOHA is ________.
By using ___________ system, change in the file contents during file transmission can be avoided.
Traditionally MANs have been implemented using one of the 2 technologies, Circuit Switching and Packet Switching
________ category of coaxial cable is used for thin Ethernet.
In Synchronous TDM, Time slots are not same in number as input devices.
In statistical time division multiplexing, number of slots in frame are less than ________.
A broadcast signal is received by the orbiting satellites which rebroadcasts ________.
A fiber -optic cable transmit signals in the form of ________.
________ is normally used where speed is priority in data transfer.
Which of the following sublyer resolves the contention for the shared media.
To calculate the data rate for noisy channel ________ formula is used.
________ is not a function of Data Link Control.
What is the period of a Sine wave having frequency of 2 Hz?
POST stand for ________?
A sine wave is defined by ___________ characteristics.
The level of signal is always positive in NRZ encoding.
Digitizing an Analog Signal is called ___________.
Each computer on the Internet has a unique numeric address called a(n) ___________.
________ is used in the Stop-and-Wait protocol to overcome the issue of duplication.
Error correction is more ________ than the error detection.
In ________, both peak amplitude and frequency remains constant as the phase changes.
At the Application layer, object/information is in the form of ________.
Quadrature Amplitude Modulation (QAM) is the combination of ________ and ________.
What is the frequency of a sine wave if it completes one cycle in 5 seconds?
Encoding digital data into digital signals is called ___________.
CDMA stands for ________.
Latency is made of ________ components.
Sampling means measuring ____________ of signal at equal intervals
Checksum is an error-detection technique that can be applied to a message of ________ length.
Which of the following is most affected by noise?
In the encoding where positive to negative transition is one and vice versa is zero.
Error detection and correction are the services provided by ________ layer.
In analog transmission, the base signal is called the________.
Mr. Asif while sitting in Lahore is talking with his friend in Dubai through Skype is an example of ________.
The type of ALOHA which improves the efficiency of Pure ALOHA is ________.
Terminal, microprocessor, computer, printer or any other device that generates or consumes digital data is known as ___________
Transmission Control Protocol is a(n) ________ layer protocol.
If the Hamming distance between sent and received code word is ________, then it shows that received data is corrupted.
Which layer is concerned with the syntax and semantics of info exchange between two systems?
YMODEM has ________ Byte of data unit.
In an analog hierarchy to carry voice channels, a group can carry ________ voice channels.
________ is an Authentication Protocol, which uses two-step process to authenticate user information.
Collisions in CSMA/CA are avoided through ________.
AM signal requires ___________ the BW of original signal
Quantization is a method of assigning ________ values in a specific range to sampled instances.
Radio wave transmission utilizes ___________ different types of propagation.
Digital signals are refered to be ___________.
There are _________ types of serial transmission.
In order to find the location of two errors in an eight bit stream, we have to see ________ different combinations.
In CSMA/CA, ________ is the amount of time divided into slots.
________ is the rate of change with respect to time.
Is there any difference between Data communication and telecommunication are network?
There are ________ basic categories of multiplexing.
Two or more computers connected so that they can communicate with each other and share information is called a ___________.
In circuit switched networks we have low efficiency but minimal ________.
Like Data link layer, ___________ is also responsible for Flow control.
Analog signals are refers to be ___________
Human voice is example of ___________ signal.
In ASK, both ______ and ________ remain constant.
Possession of TOKEN gives the station the right to ________.
What was the main draw back in ALOHA Random-Access method?
________ is correct formula to determine the total number of ports needed for one system connected in a mesh network.
BSC supports ___________ transmission using ___________ flow control.
Following characteristics fully describe ___________, Amplitude Period/Frequency Phase
CHAP is an Authentication Protocol, which uses ________ process to authenticate user information.
In ________ each band is reserved for a specific ststion, and it belongs to the station all the time.
Which error detection method uses one's complement arithmetic.
________ encoding is almost obsolete today
The most common type of connector used by coaxial cable is ________.
________ relatively measures the strength of two signals.
________ works with topologies in which one drvice is designated as a primary station and the other devices are secondary stations.
To control and manage the transfer of data, a protocol called Point to Point Protocol (PPP) is used at the ________ layer.
Session layer is responsible for _________.
Radio is an example of _______ signal conversion.
________ mode of serial transmission guarantees fixed rate of data.
Guard bands are used in ________ multiplexing technique, to avoid overlapping of frequency bands assigned to each user.
The Internet is ___________.
Time domain shows changes in ___________.
STP is more expensive than UTP and is less susceptible to noise.
In Block coding we divide our message into blocks of k bits called as ________.
________ is an Authentication Protocol, which is used by the PPP to authenticate passwords.
In even parity check code, the value of syndrome is ________ if the number of 1s is even.
The ________ is the number of signal elements sent per unit time.
In _________, a signal is directed straight from antenna to antenna.
No matter whether the link is dedicated or broadcast, data link control (DLC) layer provides services between ________.
TROPOSHERE is the layer of atmosphere above the troposhere but below space
Central Hub in a Tree is an ___________.
If we need to correct a single error in an 8-bit data unit, we need to consider ________ possible error locations.
At the CRC generator, ___________ added to the data unit before the divisional process.
________ is sometimes called the bit rate.
In OSI model headers are added at layer _________.
dB is negative if a signal is ___________.
Asynchronous TDM is efficient only when the size of the time slot is kept relatively ___________.
GO-BACK-N protocol is one of the ________ layer protocols, which is used to control the flow of data during the transmission.
________ is/are un-reliable protocol(s).
Time division multiplexing is used in ________ systems.
Which of the following is not a characteristic of a sine wave?
RZ stands for ___________.
In ________, each station sends a frame whenever it has a frame to send.
________ are used to exchange session management and control information between connected devices.
Analog To Analog Conversion Methods include ___________.
Baud rate is greater than or equal to the bit rate.
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