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