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