Recent questions and answers in Computer Networks - GATE CSE Doubts

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Self-Doubt- syllabus
Multiplexing and spectrum spreading is in the syllabus of GATE 2021. if yes, how much should I read?

asked 27 minutes ago in Computer Networks by iot_ts (6 points) | 1 view

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Book name. Behrouz AForozun network layer
Change each of the following mask to a prefix length? A 255.224 .0.0. B . 255.240.0.0 C 255.255.255.128

asked 28 minutes ago in Computer Networks by Sanjay chauhan 123 (8 points) | 1 view

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Book Name. Forozun. Chapter. Network layer
What is the size of address space in each of the following system ? a A system in which address is only 16 bits b A system in which address is made of six hexadecimal digits C. A system in which each address is made of four octal digits Explain ?

asked 28 minutes ago in Computer Networks by Sanjay chauhan 123 (8 points) | 1 view

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How only Class A networks are from only 1 -126?
Hello everyone, I wonder that why Class A networks have 1-126 network I/Ds, where Class B, Class C has 128-191 and 192-223. They should have been 129-190/193-222, right? I know that first 0 is reserved for Network I/D for a given ... for Networks. Sorry if this question is a bit silly, but I am not getting it, kindly help to get me this. Thank you.

asked Mar 26 in Computer Networks by Deb Prakash (6 points) | 10 views

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ISI 2020 pcb sample question
Recall that in go-back-N protocol, the transmitting window size is N and the receiver window size is 1. Consider a pipelined, reliable transport protocol that uses go-back-N with cumulative acknowledgment. Assume that the timeouts trigger retransmissions (but note that ... two timeouts, when (i) The bottleneck link rate is 1Gb/s. (ii) The bottleneck link rate is 2Gb/s.

asked Mar 24 in Computer Networks by Dn0047 (10 points) | 6 views

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Book name. Forouzn. Chapter name. Network layer
Which of the following cannot be mask in CIDR? ? a. 255.225.0.0 b .255.192.0.0 c .255.255.255.6 Explain

answered Mar 22 in Computer Networks by toxicdesire (293 points) | 19 views

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#test questions
Q.In a host PDU of network layer 17076 bytes.MTU size of network layer 200bytes and ipv4 header is 20bytes.number of ip fragments.

answered Feb 29 in Computer Networks by haralk10 (62 points) | 12 views

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Gate Vidyalaya
My doubt is whether we have to include only the processing time of info frame, or both info frame and ack frame while calculating the total time... Q) The values of parameters for the stop and wait protocol are as given below- Bit rate of the ... transmission efficiency (in %) of the stop and wait ARQ protocol for the above parameters is ___________ . (correct to 2 decimal places)

asked Feb 18 in Computer Networks by ummokkate (48 points) | 44 views

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ISI 2018-PCB
The data link layer uses a fixed-size sliding window protocol, where the window size for the connection is equal to twice the bandwidth-delay product of the network path. Consider the following three scenarios, in each of which only the given parameter changes as ... trip time RR increases to 1.8R; the window size W decreases to W/3 Can anyone please help with the above question?

asked Feb 15 in Computer Networks by Pratyush Priyam Kuan (804 points) | 14 views

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GATE CS 2012 QUESTION NO.45 CN
CONSIDER AN INSTANCE OF TCP'S 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 8 MSS. ASSUME THAT A TIMEOUT OCCURS ... :8 (As Threshold is again computed to be 5 after 5th T timeout ) Why not 8MSS could be the possible Answer??

asked Feb 15 in Computer Networks by bajajshubham (7 points) | 5 views

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CN GATE CS 2014 SET 1 PYQ
LET THE SIZE OF CONGESTION WINDOW OF A TCP CONNECTION BE 32 KB WHEN A TIMEOUT OCCURS. THE ROUND TRIP TIME OF THE CONNECTION IS 100 MSEC AND THE MAXIMUM SEGMENT SIZE USED IS 2 KB. THE TIME TAKEN (IN MSEC) BY THE TCP CONNECTION TO GET BACK TO 32 KB CONGESTION WINDOW ... Increment with +2 to complete in 11 RTT's. → ( My Answer ) IT Won't be done or Must happenend in 17 RTT'S

asked Feb 15 in Computer Networks by bajajshubham (7 points) | 7 views

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Data communication and networking by forouzan
11. We have a pure ALOHA network with 100 stations. If Tfr=1μsTfr=1μs, what is the number of frames each station can send to achieve the maximum efficiency. 12. Repeat Exercise 11 for slotted ALOHA. The question is also present in the following link : https://gateoverflow.in/325673/data-communication-and-networking-by-forouzan-12-exercise

asked Feb 14 in Computer Networks by Pratyush Priyam Kuan (804 points) | 11 views

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Made Easy Test Series 2020 Computer Networks
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 the last octet of last host of sixth subnet is ____?

asked Feb 4 in Computer Networks by rohit090893 (10 points) | 55 views

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madeeasy test seies mock 2
consider two nodes a and b round trip delay between these is 80ms and bottleneck bandwidth is 512kBps the optimal window size …….. if packet size is 64 B and channel is full duplex….what will be the answer i am getting 641 but they said 640….which is correct ? and what will be the answer if half duplex..?

asked Feb 4 in Computer Networks by eyeamgj (41 points) | 29 views

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Geeks For Geeks Sudo Gate Test Series
How long it will take before first full window can be sent on a channel using slow start having no congestion and round trip time of 8 msec. Receiver window size is 24 KB and the maximum segment size is 2 KB. 32 msec 88 msec 120 msec 128 msec I am getting the answer as 72 msec! But the solution given is 120 msec!

asked Feb 3 in Computer Networks by lazy_boy1997 (11 points) | 15 views

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Network Self doubt!
On which layer should we consider Broadcasting is handled on? data link or network layer?

asked Feb 2 in Computer Networks by kalra05 (73 points) | 21 views

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SELF DOUBT IN COMPUTER NETWORKS
i came across questions of fragmentation. sir i get really confused when in the question its given that message size is 1000B now should we subtract header from it and then send 980B to the other part or should we take 1000B whole ... cases in which we need to subtract header and transfer and the cases in which we directly transfer without subtracting header length.

asked Jan 31 in Computer Networks by Ashutosh07091999 (7 points) | 29 views

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Can anyone please solve Gate2007-IT-63 using probability

answered Jan 31 in Computer Networks by Debdeep1998 (104 points) | 34 views

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MADE EASY: FRAGMENTATION
In the given network, station $A$ wish to sends a payload of $1600B$ from its $network$ $layer$ to station $B$. If fragmentation is done then, the actual data size to be transmitted is? My approach, the first network has an MTU of $1500B$ therefore ... arrive at $B$ and each has a header of $20B$, so total data size is $1700B$ Is my understanding and explanation correct?

asked Jan 30 in Computer Networks by Debapaul (699 points) | 34 views

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Computer networks Ace test series

asked Jan 30 in Computer Networks by Chirag Shilwant (180 points) | 15 views

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Made easy test series : Sliding window protocol
Consider a error free satellite channel of 84 Kbps used to send 256 byte data frames in one direction, with very short acknowledgments coming back the other way, propagation time is 150 msec, what is the minium window size to that the channel is fully utilized ________. what will be the correct answer for above question

answered Jan 29 in Computer Networks by sagarkhatri (9 points) | 93 views

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Made Easy test series -CN
Consider two nodes A and C at a distance 2000m. Suppose station A starts sending a long frame at time t1=0; station C starts sending a long frame at time t2= 3 microseconds. Find the number of bits station A has sent before detecting the collision? Assume, data rate as 10 Mbps and propagation speed 2*10^8 m/s. A) 70 bits B) 65 bits C) 130 bits D) 140 bits

asked Jan 28 in Computer Networks by Rishav_Bhatt (16 points) | 52 views

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PREVIOUS GO: TIME OUT
The TCP congestion window is set to 2020 KB and a timeout occurs. Assume that the maximum segment size is 11 KB. Then, if the next four transmission bursts are all successful, the window size is _______ KB

asked Jan 27 in Computer Networks by Debapaul (699 points) | 136 views

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asked Jan 27 in Computer Networks by Vignaneswarkrishna (14 points) | 26 views

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Made Easy test series computer network window size

asked Jan 27 in Computer Networks by Ram Swaroop (305 points) | 22 views

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Self doubt CN.
Que1) Find efficiency of Ethernet. Que2) Find efficiency of CSMA/CD. Is there any difference in above questions?

asked Jan 26 in Computer Networks by tp21 (269 points) | 12 views

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Subnetting possible
How many subnets are possible with n bit number? Is it( 2^n - 2 ) or simply 2^n ??? Can someone please help me with this.

answered Jan 25 in Computer Networks by shashin (1.9k points) | 19 views

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Made easy test series self doubt
An organization is granted the block 172.89.0.0/16. The administrator wants to create 1024 subnets using 10 bits. The first and last addresses of any host in subnet 1024 respectively are A. 172.89.255.0/26 and 172.89.255.255/26 B.172.89.255.1/26 and ... .255.255/26 D.172.89.0.1/26 and 172.89.255.245/26 Please someone explain this . Given answer by made easy is D.

asked Jan 25 in Computer Networks by vijay kumar 2 (33 points) | 15 views

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ACE Full length-Network
Station A needs to send a message consisting of 15 packets to station B using a sliding window(window size 4) and Go-back-N error control strategy.All packets are ready and immediately available for transmission. If every 6th packet that A transmit gets lost(but no acknowledgement from B every last) Then what is the number of packet that A transmit for sending the message B?

answered Jan 24 in Computer Networks by shashin (1.9k points) | 15 views

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Need Good Resource
Can someone suggest a good source to study WiFi and IPv6.

answered Jan 24 in Computer Networks by Ram Swaroop (305 points) | 21 views

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made easy test series- CN
is the ans 13 or 14?

answered Jan 24 in Computer Networks by vikas999 (60 points) | 35 views

+1 vote

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applied gate tcp

asked Jan 21 in Computer Networks by abhinav649 (67 points) | 9 views

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applied gate:mock

answered Jan 20 in Computer Networks by kalra05 (73 points) | 44 views

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Made Easy CBT 2
Consider 2 nodes A and C at a distance 2000 m apart. Suppose station A starts sending a long frame at time $t_{1} = 0$ microsec. Station C starts sending a long frame at time $t_{2}=3$ microsec. What is the no. of bits station A has sent before detecting the collision? Data rate is 10 Mbps and propagation speed is $2 * 10^{8}$ m/s.

answered Jan 20 in Computer Networks by abhinav649 (67 points) | 72 views

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Made Easy Test Series Doubt
Is this soluting valid?? Some one please varify My answer cam to be 3600 bps

asked Jan 20 in Computer Networks by NandkishorN (6 points) | 6 views

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applied gate :CN(congestion window)
this sunday immmediately after sam initiates the connection ,alice decides to send him a 60 KB pic using TCP.assuming she sends the pic in 2500 B segments including 50 B header over a 2Mbps link with a propagation delay of 30 ms, ... last ACK ?tcp implements a slow start mechanism with initial congestion window of 1.neglect all other delays amd packet looses.

answered Jan 19 in Computer Networks by toxicdesire (293 points) | 36 views

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Ace test series mock test cn

asked Jan 18 in Computer Networks by Harshq (6 points) | 14 views

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GO Question CSMA/CD
Can anyone explain the answer to this question Two csma/cd stations are trying to send frames..After each frame is sent they contend for channel using backoff exponential algorithm?What is probability that contention ends on round k? Below is the selected answer Collision always occurs in round 1. ... https://gateoverflow.in/30257/csma-cd

asked Jan 17 in Computer Networks by !KARAN (351 points) | 16 views

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Self Doubt C.N
DVR(distance vector routing) : How many rounds does DVR algorithm runs per period?

asked Jan 17 in Computer Networks by tp21 (269 points) | 7 views

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ACE Test Series Question 8
Anyone please clarify.

answered Jan 17 in Computer Networks by Debapaul (699 points) | 25 views

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