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