Recent questions and answers in Computer Networks - GATE CSE Doubts

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Gate Applied Test
Give the solution in a detailed manner for clearer photo of the ques see this link:https://drive.google.com/file/d/1u7M2dlAzxFIuRKlRadhsSFtf0hAVOKRi/view?usp=sharing

asked 5 days ago in Computer Networks by Ashutosh777 (67 points) | 29 views

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Applied Course Test
Consider the effect of using slow start phase with 12ms round trip time, the size of the congestion window is set to 40kB the sender side threshold is set to 20kB. after the seventh transmission ,Timeout occurs after Timeout the time taken to send the first full window of 20 KB in millisecond (assume size at the start of the slow start phase is to 2KB ,MSS is 2KB)

asked 5 days ago in Computer Networks by Ashutosh777 (67 points) | 19 views

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Made easy workbook ,Data link layer
Which of the following is a product of LLC sublayer? A. 802.3 frame B. 802.5 frame C. PDU(Protocol Data Unit) D. Preamble Please explain the reason also.

answered 5 days ago in Computer Networks by avi_nex (5 points) | 41 views

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Unacademy Computer networks test
I am unable to understand, how did they solve this Can anyone explain this to me. 600 B message Network 1 MTU : 200B Network 2 MTU: 110 B IP overhead: 20 B what is the fragment offset for 4th packet?

answered Oct 22 in Computer Networks by vizzard110 (85 points) | 14 views

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Token Bucket Doubt
Imagine a flow specification that has a maximum packet size of 1000 bytes, a token bucket rate of 10 million bytes/sec, a token bucket size of 1 million bytes, and a maximum transmission rate of 50 million bytes/sec. How long can a burst at maximum speed last.

asked Oct 20 in Computer Networks by ghostman23111 (5 points) | 18 views

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TCP congestion control
Suppose at some nth transmission, we have to send 4 MSS. The way we send it is: 1st mss, then its ack; 2nd mss, then its ack, 3rd mss, then its ack; and finally 4th mss and then its ack. Shouln't this be considered as 4RTTs? In all ... it be a*RTT, as we have to wait for a acks? (Similar question in the congestion avoidance phase as well).Somebody please clarify this.

answered Oct 19 in Computer Networks by vizzard110 (85 points) | 22 views

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#MadeeasyTestseries
Consider GBN , in which sender and receiver window size is 5.client sends data packets 0,1,2,3,4 and packet 2 is lost. And all the ACKs are lost.what will be the contents in the receiver window and sender window before senders timeout? A.sw- 01234 rw- 23456 B.23456,23456 C.23456,01234 D.01234,01234

asked Oct 18 in Computer Networks by BHOJARAM (9 points) | 25 views

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Computer networks syllabus check
whether the following topics are in syllabus of CN for gate 2021 :- network security, IPv6, wifi, token ring(LAN), and exactly which access control methods are included?

asked Oct 15 in Computer Networks by mohitp (5 points) | 12 views

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medium access control
What topics do I have to study under Medium access control? Do I have to study aloha?

asked Oct 14 in Computer Networks by vizzard110 (85 points) | 10 views

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Computer Networks gate syllabus query
Is CSMA/CA out of gate 2021 syllabus? Or it’s just not that important?

answered Oct 10 in Computer Networks by satvik (11 points) | 29 views

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Made easy class notes
DBA of a subnet is given as 200.40.88.63 which can be possible subnet mask? a 255.255.255.224 b 255.255.255.240 c 255.255.255.248 d any of a,b,c

answered Oct 9 in Computer Networks by iarnav (231 points) | 15 views

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TCP UDP (self doubt)
there is no error control in UDP then why we 16 bit checksum field is there in the UDP header

answered Oct 8 in Computer Networks by Shashank Rustagi (513 points) | 19 views

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#CN general doubt
#CN During calculation of Transmission time = (data size/BW). So what data size will we take i.e., packet size or frame size?

answered Oct 8 in Computer Networks by iarnav (231 points) | 13 views

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TCP connections
the average throughput of a TCP connection is?

asked Oct 6 in Computer Networks by abhi_3_0_12 (5 points) | 12 views

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Doubt on PYQ in Computer Networks
https://gateoverflow.in/3732/gate2004-it-88 Here we are asked to give – “maximum possible value of the current transmit window”. Why are we answering the current transmit window after the reception of two acks? The max size of current transmit window is 12000B(=receiver window size) right?

asked Oct 1 in Computer Networks by nvs16 (9 points) | 9 views

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Self DOubt on CSMA/CD
https://gateoverflow.in/1397/gate2005-74 Why in this question is the collision noise not enough to detect the collision? Why is the sender waiting for the jamming signal to reach it? If the collision happened at midway it wouldn't wait for the jamming signal. Why are we considering jamming signal transmission time?

asked Sep 30 in Computer Networks by nvs16 (9 points) | 13 views

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made easy postal
The correct order of buffer sizes in stop and wait, GBN and SR is: (STOP and Wait) < GBN < (selective repeat) why??

answered Sep 29 in Computer Networks by iarnav (231 points) | 10 views

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#applied test series
On any given Sunday, Sam initiates a connection with his girlfriend Alice in order to plan out what movie they're going to watch on Tuesdays with Morrie. This Sunday, immediately after Sam initiates the connection, Alice decides to send him a 60 KB ... congestion window of 1. Neglect queuing and processing delays at both the sender and receiver, and assume there are no losses.

answered Sep 27 in Computer Networks by himanshu2021 (127 points) | 68 views

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how to calculate throughput of ethernet
consider csma/cd topology where propogation delay is 1 sec , transmission delay is 5 sec what is the throughput?

answered Sep 27 in Computer Networks by kaleen bhaiya (9 points) | 19 views

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Go-back-N receivers window size
What is the receivers window size in GBN? Is it always 1? Or can it be more. I learned that it is always 1 but in Tanenbaum book it is written that it can be more than 1.

asked Sep 20 in Computer Networks by RasMalai (27 points) | 13 views

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Computer Networks self doubt
I have a doubt. 2nd one is from pdf version,1st one is from book. See the marked part (yellow colour) in pdf and arrow (red part) on book. Both are from Computer Networks book by forouzan. Which one is true N or N+1? As there was a question from this part in Gate 2020

asked Sep 20 in Computer Networks by premu (97 points) | 13 views

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GATE 2021 Cse
Is Token Ring still in syllabus for GATE CSE 2021?

asked Sep 19 in Computer Networks by prgyadav (5 points) | 13 views

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#Selfdoubt #networks Data link layer
This is the analogy used by Forouzan for making us understand the data link layer of the source host needs only to encapsulate, the data link layer of the destination host needs to decapsulate, but each intermediate nodes needs to both ... and decapsulate. Anyone help me understanding how this analogy is relevant with the given statement. Thanks in advance.

asked Sep 12 in Computer Networks by Vishal_kumar98 (7 points) | 15 views

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Can anyone provide solution to this test series question on CN

answered Sep 9 in Computer Networks by Shashank Rustagi (513 points) | 39 views

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COMPUTER NETWORKS NPTEL ASSIGNMENT QUESTION

asked Sep 9 in Computer Networks by Shashank Rustagi (513 points) | 38 views

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CN ME TEST SERIES QUESTION self doubt
Consider a CSMA/CD with frame size is 20 KB and transmission rate is 10 Kbps then maximum length of the cable (km) required, if signal speed is 15 km/sec (Upto 2 decimal places) Is the answer 600?

answered Sep 3 in Computer Networks by raviranjan21 (5 points) | 16 views

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Self Doubt (Computer Network)
What will be the position of hosts which have taken services from DHCP server, when DHCP server goes down? Will it be able to communicate with the other hosts or outside the network? Please explain in details with references.

asked Sep 2 in Computer Networks by Mellophi (333 points) | 12 views

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Self Doubt on Sliding Windows
What is the correct formula for RTT? Is it RTT = 2 * Tp or RTT = Tt + 2 Tp. Normally I use RTT = 2 * Tp but this question confuses me.

answered Sep 1 in Computer Networks by prakashm (5 points) | 25 views

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Made Easy Topic Wise
My answer is DNS Query → HTTP GET Request → TCP SYN Given DNS Query → TCP SYN → HTTP GET Request. Am I correct?

answered Sep 1 in Computer Networks by prakashm (5 points) | 36 views

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Made Easy Topic Wise
Can someone explain the process?

asked Sep 1 in Computer Networks by Mellophi (333 points) | 41 views

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applied course test series
For a Tcp connection intially congestion window size =1MSS A file of size 60 Kb is to be transmitted in packets of 2500 bytes which includes header of size 50 Byte Tp=30 ms Find total time from start of connection till the time when last ack is recived a 420 b 500 c 540 d none

answered Aug 30 in Computer Networks by Akanksha Agrawal (309 points) | 33 views

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MADE EASY DB + CN GATE 2020 test series
Why option B is correct can anyone explain this?

answered Aug 26 in Computer Networks by Akanksha Agrawal (309 points) | 27 views

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I have self doubt in the total time required for Polling in Control access methods in computer networks.

answered Aug 26 in Computer Networks by vishnu_m7 (73 points) | 57 views

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COMPUTER NETWORKS IIT Bombay notes
1. Which of the following best describes the concept of "protocol"? A) A protocol is a connection for peer layers of a network to communicate with each other. B) A protocol is a set of rules which govern the syntax and semantics of ... interpretation of data in a network. D) A protocol is a set of services that one layer uses from layers below it.

answered Aug 25 in Computer Networks by Ollie (453 points) | 27 views

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Computer networks IIT Bombay worksheet
Consider the extended LAN shown in Fig 1 below. Show the main steps of the spanning tree algorithm being executed by the Bridges. Show which ports of which bridges are not selected in the final configuration after completion of the spanning tree algorithm.

answered Aug 24 in Computer Networks by Mellophi (333 points) | 27 views

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IIT B CN question list

answered Aug 24 in Computer Networks by Shashank Rustagi (513 points) | 29 views

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Computer networks IIT Bombay NOTES

answered Aug 24 in Computer Networks by Akanksha Agrawal (309 points) | 169 views

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Regarding Changes made in CN syllabus.
I have a query regarding changes made in Computer Networks subject. Previously, there was no Token Ring in syllabus and along with that Aloha was not there, but in NEW syllabus of CN it's explicitly mentioned in Data Link Layer "Medium ... Aloha. So, should we consider Token Ring and Aloha back in the syllabus for Gate 2021? Kindly advise. Thank you.

answered Aug 23 in Computer Networks by SarathBaswa (337 points) | 35 views

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Made Easy CN doubt
A large no of consecutive IP addresses are possible starting at 201.16.0.0 suppose 4 persons A,B,C,D request for 3000,4000,2000,10000 IP addresses respectively.Find the correct mask for D?? This is the solution provided by them and i think the way they distributed the IP address is incorrect??CAN SOMEONE GIVE THE CORRECT DISTRIBUTION OF THE IP ADDRESSES!!!

asked Aug 22 in Computer Networks by Ashutosh777 (67 points) | 11 views

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Coaching Assignment
Answer given is – c.

answered Aug 19 in Computer Networks by Ashutosh777 (67 points) | 20 views

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