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Recent questions tagged slotted-aloha

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madeeasy testseries
0.5028 0.2604 0.4792 0.6305

nihal_chourasiya asked in Computer Networks Oct 11, 2023

by nihal_chourasiya

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1 answer

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Made Easy Test Series 2024
A large population of ALOHA users manages to generate 50 requests/sec, including both original and retransmission time is slotted in units of 40 msec. What is the change of success on the first attempt? A. $e^-1$ B. $e^-2$ C. $ e^-0.5$ D. $(1/2)*e^0.5$

Ray Tomlinson asked in Computer Networks Aug 16, 2023

by Ray Tomlinson

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Aloha network
Given an ALOHA network: - Speed of the channel is 10Mbit/s. Channel length is 500m. Speed of signal in the channel is 2*10^8 m/s. - There're 30 computers connected to this network - The average speed of data flow from the application ... with the length of each packet is 100bit and 1000bit. Discus about the relationship between packet length, channel length and throughput S max?

Omachi asked in Computer Networks Aug 1, 2023

by Omachi

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Computer Networks Book by Andrew S. Tanenbaum

irfan_cse asked in Computer Networks Apr 4, 2023

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Aloha | Computer Networks
Consider a network uses the slotted ALOHA medium access control protocol and network have 5 active nodes. Assume, each node attempts to transmit a frame in each slot with probability 0.2 and this frame can be new or old collided frame. The probability of ... of a frame from any node in a given slot is (Rounded off upto two decimal places) Ans : 0.4096 Please Explain

abhinowKatore asked in Computer Networks Dec 29, 2022

by abhinowKatore

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2 answers

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#Self Doubt
When we say that vulnerable time in pure aloha will be 2*frame transmission time.So what this frame transmission time?? My doubt is does frame transmission time= propagation time+transmission time … collision can also happen during propagation time ??

lalitver10 asked in Computer Networks Sep 14, 2022

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Forouzan book :- Throughput of a network
There are only three active stations in a slotted aloha network :A,B,C.Each station generates a frame in a time slots with the corresponding probabilities $P_{A}=0.2,P_{B}=0.3,P_{C}=0.4$ respectively. What is the throughput of each station? What is the throughput of entire network?

Kabir5454 asked in Computer Networks May 28, 2022

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Forouzan question:- Expected no of empty slots in slotted aloha
A slotted aloha network is working with maximum throughput.How many slots, n, on average, should pass before getting an empty slot?

Kabir5454 asked in Computer Networks May 28, 2022

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6 votes

1 answer

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Data communication and networking by forouzan 12.7 Exercise Qn 16
16. In a CDMA/CD network with a data rate of 10 Mbps, the maximum distance between any station pair is found to be 2500 m for the correct operation of the collision detection process. What should be the maximum distance if we increase the data rate to 100 Mbps? To 1 Gbps? To 10 Gbps?

Mk Utkarsh asked in Computer Networks Nov 7, 2019

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Data communication and networking by forouzan 12.7 Exercise Qn 15
15. In a CDMA/CD network with a data rate of 10 Mbps, the minimum frame size is found to be 512 bits for the correct operation of the collision detection process. What should be the minimum frame size if we increase the data rate to 100 Mbps? To 1 Gbps? To 10 Gbps?

Mk Utkarsh asked in Computer Networks Nov 7, 2019

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5 votes

2 answers

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Data communication and networking by forouzan 12.7 Exercise
11. We have a pure ALOHA network with 100 stations. If $T_{fr} = 1 \mu s$, what is the number of frames each station can send to achieve the maximum efficiency. 12. Repeat Exercise 11 for slotted ALOHA.

Mk Utkarsh asked in Computer Networks Nov 7, 2019

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Andrew S. Tanenbaum Edition 5 Exercise 4 Question 5 (Page No. 351)
In an infinite-population slotted ALOHA system, the mean number of slots a station waits between a collision and a retransmission is 4. Plot the delay versus throughput curve for this system.

ajaysoni1924 asked in Computer Networks Mar 15, 2019

by ajaysoni1924

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1 answer

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Andrew S. Tanenbaum Edition 5 Exercise 4 Question 4 (Page No. 351)
A large population of ALOHA users manages to generate 50 requests/sec, including both originals and retransmissions. Time is slotted in units of 40 msec. (a) What is the chance of success on the first attempt? (b) ... of exactly k collisions and then a success? (c) What is the expected number of transmission attempts needed?

ajaysoni1924 asked in Computer Networks Mar 15, 2019

by ajaysoni1924

1.7k views

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2 answers

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Andrew S. Tanenbaum Edition 5 Exercise 4 Question 3 (Page No. 351)
Consider the delay of pure ALOHA versus slotted ALOHA at low load. Which one is less? Explain your answer.

ajaysoni1924 asked in Computer Networks Mar 15, 2019

by ajaysoni1924

5.6k views

1 vote

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Token passing and Aloha
Shall I cover token passing and aloha in flow control methods in computer network. Please suggest as I don't want to waste time if it's not in syllabus. Thanks

Mayankprakash asked in Computer Networks Dec 26, 2018

by Mayankprakash

729 views

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2 answers

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sudo gate test series
The bandwidth of a given medium for transferring the data is 100 Mbps. The user starts with pure aloha for transmission after half of the data is transferred user switched to slotted aloha. Then how much throughput will be gain or loss by the user in the second half? A 50% loss B 100% loss 100% gain D 200% gain i am getting 100% tell me what u are getting

Gurdeep Saini asked in Computer Networks Nov 9, 2018

by Gurdeep Saini

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Consider 2 stations at a distance of 1 km from each other (Aloha)
Consider 2 stations at a distance of 1 km from each other. A station transmits frames of length 100 bits at the rate of 1 Mbps. Velocity of propagation is 2 * 108 m/s. Assume that each station generates frames at an average rate of 10000 frames per second. What is the probability of collision for pure ALOHA and slotted ALOHA ?

Mk Utkarsh asked in Computer Networks Oct 2, 2018

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3 votes

3 answers

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Slotted Aloha
Let N station share 60 kbps of slotted aloha channel. Frame size is 1024 bits which are send at every 40 seconds. The value of N is ?

Na462 asked in Computer Networks Sep 15, 2018

by Na462

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kallu singh asked in Computer Networks Aug 24, 2018

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3 votes

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UGC NET CSE | July 2018 | Part 2 | Question: 41
A slotted ALOHA network transmits 200-bit frames using a shared channel with a 200 Kbps bandwidth. Find the throughput of the system (all stations put together) produces 250 frames per second: 49 368 149 151

Pooja Khatri asked in Computer Networks Jul 13, 2018

by Pooja Khatri

15.3k views

1 vote

1 answer

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Computer Networks 5th edition by Tanenbaum chapter 4 question 4
A large population of ALOHA users manages to generate $50 \hspace{0.1cm} requests/sec$, including both originals and retransmissions. Time is slotted in units of $40 \hspace{0.1cm} msec$. What is the chance ... is the probability of exactly k collisions and then a success? What is the expected number of transmission attempts needed?

Abhilash Mishra asked in Computer Networks May 29, 2018

by Abhilash Mishra

1.2k views

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Computer Network
In an infinite slotted ALOHA system the mean number of slots a station waits between a collision and a retransmission is 4. Give the relationship between the delay versus throughput of this system.

hrcule asked in Computer Networks Apr 27, 2018

by hrcule

338 views

1 vote

1 answer

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Parshu gate asked in Computer Networks Nov 6, 2017

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