Data Communication and Computer Network
Questions and Answers 1 to 10
1.
|
Which
error detection method consists of a parity bit for each data unit as well as
an entire data unit of parity bits?
(a) VRC (b) LRC (c) CRC
(d) Checksum (e) None of the above.
|
Which
of the following encoding method does not provide for synchronization?
(a) NRZ-L (b) RZ (c) B8ZS
(d) HDB3 (e) Manchester.
|
|
Consider
the following Fig 1 which consists of five different network topologies
In the above figure, which of the
following correctly identifies the respective topologies?
(a) Graph, ring,
star, unconnected, fully connected
(b) Star, ring ,
tree, uncompleted, fully connected
(c) Star, rounded,
graph, irregular, fully connected
(d) Ring, tree,
star, regular, fully connected
(e) Star, ring,
tree, irregular, fully connected.
|
|
Shannon’s
noisy channel capacity theorem states that C = H Log2( 1 +
S/N) bits per second. In this equation
H stands for
(a) C is the
bandwidth of the signal
(b) H is the
bandwidth of the Channel
(c) C is the
bandwidth of the Channel
(d) H is the
bandwidth of the signal
(e) S/N is in
decibels.
|
|
When
signals are used to transmit digital data
(a) Channel of
infinite bandwidth must be used for 100% accurate reception of data
(b) A modulation
technique must always be used
(c) The data rate is
only limited by the bandwidth of the channel used
(d) Data must be
decoded on to the signal at the transmitter
(e) The Noise level
of the channel can increase the bandwidth.
|
|
In
go-back-n ARQ, if frames 4, 5, 6 are received successfully, What is the ACK
number receiver may send to the sender?
(a) 5 (b) 6 (c) 7 (d) 8 (e) 9.
|
|
Transmitted
signals across band limited channels are distorted due to
(a) External
interferences.
(b) Attenuation of
some of the frequency components
(c) Delays in some
frequency components
(d) Reductions in
the amplitudes of the transmitted frequency components
(e) Amplification of
the unwanted frequency components.
|
|
The
following statements can be made in general on data communication links.
I. Digital data
cannot be transmitted along analog transmission links.
II. A modem is an
essential component of a serial data link.
III. Full duplex
communication is not done on serial transmission.
IV. Parallel links
are used in interconnecting subsystems of a computer system.
Which
of the following statements are correct?
(a) (I) and (IV) are correct, (II) and (III) are incorrect
(b) (I) and (II) are correct, (III)
and (IV) are incorrect
(c) (II) and (iv) are correct, (I)
and (III) are incorrect
(d) (II) and (III)
and (IV) are correct, (I) is incorrect.
(e) (I), (II) and (III) are incorrect, (iv)
is correct.
|
|
In
a Bit Oriented Synchronous Transmission Scheme, the bit pattern
1010111111111111110001100000001010111110 has to be transmitted as the frame
content. If the opening and the closing flags have the form 01111110, which
of the following pattern(s) enable(s) data transparency?
(a) 01111110101011111111111111000110000000101011111001111110
(b) 01111110101011111011111011110001100000001010111110001111110
(c) 011111010101011111011111011110001100000001010111110011111010
(d) 0111111010101111110111111011000110000000101011111001111110
(e) 0111111010101111111111111110001100000100101011111001111110.
|
|
How
many bits are allocated for the host part in a class A type of an IP address?
(a) 8 (b) 16 (c) 24 (d) 32 (e) 48.
|
Answers
1.
|
Answer : (b)
Reason : LRC
error detection method consists of a parity bit for each data unit as well as
an entire data unit of parity bits.
|
Answer : (a)
Reason : NRZ-L
encoding method does not provide for synchronization.
|
|
Answer : (e)
Reason : Star,
ring, tree, irregular, fully connected.
|
|
Answer : (b)
Reason :. H
is the bandwidth of the Channel.
|
|
Answer : (c)
Reason : When signals are used to
transmit digital data ,the data rate is only limited by the bandwidth
of the channel used.
|
|
Answer : (c)
Reason : In
go-back-n ARQ, if frames 4, 5, 6 are received successfully, What is the ACK
number receiver may send to the sender is 7.
|
|
Answer : (b)
Reason : Transmitted
signals across band limited channels are distorted due to attenuation of some
of the frequency components.
|
|
Answer : (e)
Reason: (i),
(ii) and (iii) are incorrect, (iv) is correct.
|
|
Answer : (b)
Reason : 01111110101011111011111011110001100000001010111110001111110.
|
|
Answer : (c)
Reason : 24
bits are allocated for the host part in a class A type of an IP address.
|
An author must have a vast knowledge of vocabulary. The dictionary of a writer must be full of new english vocabulary to make their work more attractive. Use of new words makes their work more valuable and graceful.
ReplyDeleteassistenza informatica milano
Your blogs are always interesting. Thank you for sharing helpful content with us.
DeleteGet ISO certified
ReplyDeleteinformation security consulting
iso 27001 consulting
ISO 27000 certification in Bangalore
ISO 27000 certification
ISO certification
ReplyDeleteIf you think, you have the capability to think smartly then go and download rummy game app on your phone and start playing it and get more exciting prizes with each win. Check the latest promotions, rummy tournaments, news and updates in our rummy blog section.
I was looking for such type of information over the internet but could not find it. I was really worried because I had an assignment that could only be completed after getting such type of information. Although, I decided to find any cheap assignment writing service UK but now I think I should try myself at least once.
ReplyDeleteExcellent. Good blog. Keep sharing. I love them Are you also searching for write my nursing research paper? we are the best solution for you. We are best known for delivering nursing research paper writing services to students without having to break the bank
ReplyDeleteGreat Platform. Are you also searching for nursing essay writing help? we are the best solution for you. We are best known for offering the best nursing essay writing services
ReplyDeleteThis is quite a .good blog. Keep sharing. I love them Are you also searching for nursing paper writing service ? we are the best solution for you. We are best known for delivering nursing paper writing services to students without having to break the bank.
ReplyDeleteGibbs reflective cycle in Gibbs Model of Reflection
ReplyDeleteGibbs reflective cycle in Gibbs Model of Reflection
Get Gibbs reflective cycle in Gibbs Model of Reflection Assignmnt help by HND Assignment Help at an Affordable Price and Quality Delivery on Time. We have more than 7000+ Qualified British Experts in the team to give you the best online assignment help.
https://www.hndassignmenthelp.com/gibbs-reflective-cycle-in-gibbs-model-of-reflection/
hndassignmenthelp, assignmenthelponline, gibbsreflectivecycle, gibbsmodelofreflection
HND Assignment Help
I just had to share my amazing experience with Finance Assignment Help in USA. Being a student pursuing my finance degree, I often found myself struggling with complex assignments and projects. It was becoming overwhelming, affecting my grades and even causing stress. That's when I stumbled upon a fantastic online service that offers expert finance assignment help. They have a team of knowledgeable and experienced professionals who truly understand the subject inside out. The best part is their dedication to delivering high-quality, plagiarism-free work on time.
ReplyDeleteThanks For Read This!