Recent questions and answers in Computer Networks

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2 answers

1

MAC and IP Addresses Doubt
MAC and IP Addresses are both globally unique. Can MAC Address be used in Internet Instead of IP Address? Why or why not?

answered 47 minutes ago in Computer Networks by YesAbhisa (247 points) | 76 views

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1 answer

2

MAC address, IP address, transmission of packet from one point to another.
I was studying how the packet is transmitted from source to destination, what i understood is, we need IP address to identify the network in which our destination is present, while MAC address (data link layer address) ... .com/change-mac-address-in-windows). How is it possible if MAC address is present in the NIC?

answered 1 hour ago in Computer Networks by YesAbhisa (247 points) | 52 views

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1 answer

3

ME test series question on IP and MAC

answered 1 hour ago in Computer Networks by YesAbhisa (247 points) | 7 views

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4

Made Easy
Consider the following statements: S1: In ethernet, jamming signal ensure that all nodes using the channel are aware for their transmission(s) failed. S2: Bit stuffing ensures that all frames are of the same size. Which of the following is true? (a) Only S1 (b) Only S2 © Both S1 and S2 (d) Neither S1 nor S2

asked 3 hours ago in Computer Networks by Somoshree Datta 5 Active (3.8k points) | 14 views

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5

ME Test Series Question

asked 7 hours ago in Computer Networks by Shankar Kakde (249 points) | 7 views

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1 answer

6

GATEBOOK-2019 Grand Test CN-11
Consider two links, $(A,B)$ and $(B,C)$, with propagation delays of $d1$ and $d2$, respectively. Assume that $\text{host A}$ sends $\text{M packets}$ to $\text{host C}$ using a sliding window flow control protocol with a window of size $W$. What is the minimum time ... $(d1+d2) MW$ $2(d1+d2)\left \lceil \left ( \dfrac{W}{M} \right ) \right \rceil$ $2(d1+d2)W$

answered 13 hours ago in Computer Networks by Ashwani Kumar 2 Boss (12.7k points) | 50 views

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1 answer

7

GATEBOOK-2019 Grand Test CN-17
An organization has a class $C$ ... $W: 255.255.255.223,\: X \& Y\& Z : 255.255.255.223$

answered 13 hours ago in Computer Networks by Shaik Masthan Veteran (50.1k points) | 41 views

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0 answers

8

Applied Gate mock -3 (computer networks)
Consider a TCP connection between two machines (A and B) in an environment with 0% packet loss. Assume the round trip time (RTT) between the two machines is 4 [seconds], and the segment size is 3 [Kbytes]. The bandwidth of the connection ... as minimum possible window size.. Can this be possible plz explain me how to solve this problem if it is correct .

asked 19 hours ago in Computer Networks by Prasad Budithi (73 points) | 15 views

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0 answers

9

Retransmission Timer Value
If TCP RTT is currently 20 ms and following acknowledgement come in after 22,24 and 23 ms respectively. What is new RTT estimate ? 28.527 28.82 20.82 21.22

asked 19 hours ago in Computer Networks by Na462 Loyal (8k points) | 10 views

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10

Madeeasy-TestSeries
A leaky Bucket with capacity 200MB is at host network interface. The data rate on the network is 2MBps. If the Host has 450 MB to send on the network and it sends data in a burst, then the maximum data speed from the host in order that no data is lost is ______MBps

asked 19 hours ago in Computer Networks by dharmesh7 Junior (865 points) | 8 views

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11

made easy test series
For a class C network if IP address of a computer is 200.99.39.112 and subnet mask is 255.255.255.224 the decimal value of last octet of last host of sixth subnet is __________

asked 20 hours ago in Computer Networks by pream sagar Active (1.1k points) | 11 views

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12

Can some post any good source or question link on sample RTT and Dev RTT?
I went through some random GO links but could not find proper example over the mentioned topics, can someone please help and post one if you know?

asked 22 hours ago in Computer Networks by S Ram Active (1.9k points) | 8 views

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1 answer

13

GATEBOOK-2019 Grand Test CN-29
Determine the maximum length of the cable $\text{(in km)}$ for transmitting data at a rate of $\text{1 Gbps}$ in an $\text{Ethernet LAN}$ with frames of size $\text{4000 bits}$. Assume the signal speed in the cable to be $\text{2,00,000 km/s}$. $\text{100 meters}$ $\text{200 meters}$ $\text{400 meters}$ $\text{500 meters}$

answered 23 hours ago in Computer Networks by Subarna Das Boss (16.4k points) | 35 views

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1 answer

14

A system uses Selective-Repeat protocol.(Applied gate mock - 3)
A system uses Selective-Repeat protocol with a window size of 4.If each packet carries 5000 bits of data, then the time taken to transfer 5 million bits of data, if the distance between sender and receiver is 2500 Km, the propagation speed ... .25s I think answer should be around 7.5 to 7.8.. Can any one explain what the answer is ??

answered 23 hours ago in Computer Networks by chauhansunil20th Active (3.9k points) | 32 views

+1 vote

1 answer

15

Madeesay Test Series
Consider TCP implements an extension that allows window size much larger than 64KB. Suppose you are using this extended TCP over a 1Gbps link with a latency of 50ms to transfer a 10 MB file and TCP receive window is 1MB. If TCP sends 1KB packet ... multiplied by link latency, then effective throughput of transfer is x Mbps. Find x. (Assuming no congestion and no lost packets)

answered 23 hours ago in Computer Networks by Sambhrant Maurya Active (1.2k points) | 90 views

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1 answer

16

Made Easy test series
Consider a system using Go-Back-N protocol over fibre link with bandwidth 1Gbps and packet size 512B. Propagation speed of fibre is 2*108m/sec with length 1Km. Assume error free and duplex communication with ACK packet size 64B. Then the value of N that yields maximum utilization of the sender is______?

answered 1 day ago in Computer Networks by Nandkishor3939 Junior (657 points) | 206 views

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17

token bucket
A token bucket scheme is used for traffic shaping. a new token is put into the bucket at every 10 micro second. assume each token pick one packet which contain 2B of data. it is observed that initial capacity of bucket is 10 Mb. the computer can transmit at full speed of 8 ... = MT what is R? is it token arriving rate (0.1M/s) or data transmitted equivalent to token (16bits * 0.1M/s) ?

asked 1 day ago in Computer Networks by Rahul_Rathod_ Junior (543 points) | 23 views

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0 answers

18

Made Easy CBT 19
What is optimal and Estimated Cost here, and why eliminate option A and C, why option B is correct.

asked 1 day ago in Computer Networks by Raja Rawal (457 points) | 31 views

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0 answers

19

madeeasy test series
this is a c function which adds the newly created node at the end(tail) of link list . this node is pointed by q and next of this node is already null. struct *node *add(struct node*head ,struct node *q) the number of ways to fill the boxes so function ... while how second is true becz when on;ly one node in list then second will fail ..answer is given as 1 and 2 are true .

asked 1 day ago in Computer Networks by eyeamgj Loyal (6.6k points) | 13 views

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20

madeeasy test series
a group of n stations share a 100kbps pure aloha channel .each station outputs a 1000B frame on average every 50 sec . the maximum value of N? answer given as 920 but i am getting 115 please check

asked 1 day ago in Computer Networks by eyeamgj Loyal (6.6k points) | 30 views

+1 vote

0 answers

21

Made Easy Gate Mock-1 Question 56
Consider a TCP connection using the multiplicative additive congestion control algorithm where the window size is 1 MSS and the threshold is 32 MSS. At the $8^{th}$ transmission timeout occurs and enters in the congestion detection phase. The value of the window ... transmission. So we have to take the window size after the 12 RTTs right and not at 12th RTT?

asked 1 day ago in Computer Networks by MiNiPanda Boss (19.7k points) | 66 views

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22

Madeeasy-Testseries
In a RSA cryptosystem a participant uses two prime numbers p and q is 17 and 11 respectively to generate his/her public and private keys...If the public keybof participant is 7 and cipher text C is 11 then the original message M is_________

asked 1 day ago in Computer Networks by dharmesh7 Junior (865 points) | 25 views

+1 vote

2 answers

23

GATEBOOK-2019 Grand Test CN-16
In a communication link out of $\text{p packets}$ one packet will be lost. If stop and wait protocol is used then expected number of retransmissions for a packet? $\dfrac{p}{p-1}$ $p$ $\dfrac{1}{p-1}$ $\dfrac{1}{p}$

answered 1 day ago in Computer Networks by Arjun Veteran (377k points) | 96 views

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1 answer

24

Computer net - York University
Consider a TCP connection between two machines (A and B) in an environment with 0% packet loss. Assume the round trip time (RTT) between the two machines is 4 [seconds], and the segment size is 3 [Kbytes]. The bandwidth of ... the sender before the first ack arrives back.) ? https://www.eecs.yorku.ca/course_archive/2010-11/W/3214/CSE3214_Final_Winter2010_solutions.pdf

answered 2 days ago in Computer Networks by Arjun Veteran (377k points) | 24 views

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1 answer

25

GATEBOOK-2019 Grand Test CN-27
Using the $CRC$ method, the remainder obtained by dividing $x^9 + x^7 + x^3 + x^1$ by generator polynomial $x^3 + x + 1$ ? $1$ $x$ $x^2$ $1+x + x^2$

answered 2 days ago in Computer Networks by Gate2019 Active (1.7k points) | 90 views

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2 answers

26

GATEBOOK-2019 Grand Test CN-30
A network advertises the $CIDR$ network number $50.1.56.0/22$ (and no other numbers). Which of the following $\text{IP addresses}$ could the network own? 1. $ 50.1.57.0 $ 2. $ 50.1.59.1 $ 3. $ 50.1.60.0 $ 4. $ 50.1.120.0 $ $\text{Only 1}$ $\text{Only 1 and 2}$ $\text{Only 1,2 and 3}$ $\text{All of 1,2,3 and 4 }$

answered 2 days ago in Computer Networks by Gate2019 Active (1.7k points) | 50 views

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27

made easy test series
Consider an instance of TCP additive increase multiplicative decrease (AIMD) algorithm where the window size at the start of the slow start phase is 2 MSS and the threshold at the start of the first transmission is 12 MSS. Assume that a time out occurs ... (in MSS) My question is, After reached to threshold, should we have to increase congestion window with 1MSS or with 2MSS.

asked 2 days ago in Computer Networks by JAYKISHAN (65 points) | 37 views

+21 votes

8 answers

28

GATE2006-44
Station $A$ uses $32$ $\text{byte}$ packets to transmit messages to Station $B$ using a sliding window protocol. The round trip delay between A and $B$ is $80$ $\text{milliseconds}$ and the bottleneck bandwidth on the path between $A$ and $B$ is $128$ $\text{kbps}$ . What is the optimal window size that $A$ should use? $20$ $40$ $160$ $320$

answered 2 days ago in Computer Networks by Rajesh Panwar Junior (507 points) | 7.5k views

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0 answers

29

made easy mock 2019
(i)A computer can have multiple MAC addresses (ii)A computer can have multiple IP addresses at different instances of time true/ false?? acc to me (i) false (ii)true

asked 2 days ago in Computer Networks by Gate Fever Active (4.4k points) | 32 views

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0 answers

30

ACE TEST SERIES

asked 3 days ago in Computer Networks by Shankar Kakde (249 points) | 13 views

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0 answers

31

ACE TEST SERIES

asked 3 days ago in Computer Networks by Shankar Kakde (249 points) | 21 views

+1 vote

3 answers

32

computer network
Consider a misbehaving TCP receiver. The receiver modifies its TCP such that upon receiving a data segment containing N bytes, the receiver divides the resulting acknowledgment into M, where M<=N, separate acknowledgments each covering one of distinct pieces of the ... , 3002, 4503 and 6004. (D) Response will be packets with byte sequence numbers 1501, 3001, 4501 and 6001.

answered 3 days ago in Computer Networks by Ashish Goyal (245 points) | 98 views

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0 answers

33

Gateforum Test Series
Consider a scnario of CSMA/CD network. Suppose A & B attempt to transmit a frame simultaneously and collide. Using exponential backoff algorithm A chooses K=0 and B chooses K=1. Again they collide and after the 2nd collision both A & B will choose K with equal probability from set: For A {0,1} ... 0,1} For A {0,1} and for B {0,1,2,3} For A {0,1,2,3} and for B {0,1,2,3}

asked 3 days ago in Computer Networks by Gupta731 Active (4.3k points) | 24 views

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0 answers

34

ME_test_series
Assume in TCP client is sending segment to server. After successfully receiving segments from client, server is waiting for next segments and clients is also waiting for acknowledgment from the server and this lead to deadlock situation. Which timer is used and who ... timer, client Keep alive timer, client I am not understand how persistent timer is used and what is it used for?

asked 3 days ago in Computer Networks by Shivam Kasat Active (1.6k points) | 19 views

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0 answers

35

Self doubt(Sliding Window)
In sliding window protocol question if to maintain some x% efficiency if we got window size in fraction ..should we take ceil or floor Eg : GBN to get 60% eff ..we got Ws=9.3 What will be answer 9 OR 10

asked 4 days ago in Computer Networks by jatin khachane 1 Loyal (5.5k points) | 15 views

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0 answers

36

made easy cn 2018
consider the following statement:- data link layer define the boundaries of frame because framing is always of fixed size true or false?? acc. to me , its true

asked 4 days ago in Computer Networks by Gate Fever Active (4.4k points) | 34 views

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2 answers

37

ME Test Advanced
Consider an error-free 64kbps satellite channel used to send 512 bytes data frames in one direction, with very short acknowledgements coming back the other way. assume the earth-satellite propagation time is 270 msec. What is the minimum window size so that the channel is fully utilized? I am getting answer as 7. Answer given 10.

answered 4 days ago in Computer Networks by Prateek Chanda (25 points) | 23 views

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38

Self doubt
11^23 mod 187= 149 by using virtual gate calculator... plz tell me where i am wrong...??

asked 4 days ago in Computer Networks by Vikas123 (355 points) | 22 views

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39

Self doubt
Here last step i didn't understand… 11^23 mod 187=88....HOW..?? m getting 11^23 mod 187 = 149 by using Gate virtual calculator...??? [closed]

asked 4 days ago in Computer Networks by Vikas123 (355 points) | 11 views

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0 answers

40

GateBook
In a DLL layer, bit stuffing is used in transferring data. If the sent data after bit stuffing is 001111101101011111001111 and the flag is 01111110, then what will be the data after de-stuffing. [closed]

asked 4 days ago in Computer Networks by VikramRB (163 points) | 36 views

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author	user:martin
title	title:apple
content	content:apple
exclude	-tag:apple
force match	+apple
views	views:100
score	score:10
answers	answers:2
is accepted	isaccepted:true
is closed	isclosed:true

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