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