Recent questions and answers in Computer Networks - GATE CSE Doubts

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asked 14 hours ago in Computer Networks by Vignaneswarkrishna (14 points) | 12 views

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Made Easy test series computer network window size

asked 15 hours ago in Computer Networks by Ram Swaroop (172 points) | 3 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 1 day ago in Computer Networks by tp21 (268 points) | 11 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 1 day ago in Computer Networks by shashin (1.4k points) | 17 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 2 days ago in Computer Networks by vijay kumar 2 (31 points) | 11 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 2 days ago in Computer Networks by shashin (1.4k points) | 11 views

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

answered 2 days ago in Computer Networks by Ram Swaroop (172 points) | 17 views

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

answered 3 days ago in Computer Networks by vikas999 (59 points) | 25 views

+1 vote

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applied gate tcp

asked 6 days ago in Computer Networks by abhinav649 (66 points) | 7 views

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applied gate:mock

answered Jan 20 in Computer Networks by kalra05 (50 points) | 34 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 (66 points) | 59 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) | 4 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 (226 points) | 32 views

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Ace test series mock test cn

asked Jan 18 in Computer Networks by Harshq (6 points) | 13 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 (197 points) | 14 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 (268 points) | 7 views

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ACE Test Series Question 8
Anyone please clarify.

answered Jan 17 in Computer Networks by Debapaul (656 points) | 23 views

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Made easy test series : Ethernet
The length of cable for standard ethernet is 2500m. What would be length of cable for fast gigabit ethernet i.e. 1000baseT in order to maintain same size is ________. Can someone explain ,how to solve above question?

asked Jan 15 in Computer Networks by vishal burnwal (125 points) | 19 views

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madeeasy Ccomputer Networks
Assume there are 50 nodes are connected to a 1 km length of the coaxial cable. Using some protocol, each node can transmit 50 frames/second, where the average frame length is 3000 bits. The transmission rate at each node is 100 Mbps. The percentage efficiency of this protocol is ________.

asked Jan 15 in Computer Networks by suchithreddy (7 points) | 8 views

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Made Easy FUll length Test
Consider the following statements: I. Synchronous bits are not treated as the part of data in synchronous transmission. II. With absence of DHCP server using IPv6 protocol is not possible. Which of the above statement(s) is/are not true? Only I Only II Both I and II Neither I nor II Anyone please clarify.

asked Jan 15 in Computer Networks by Shivateja MST (102 points) | 12 views

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Ace Academy test series : Computer Networks
Got the total length as 28 Bytes but how do I decide whether its going from client to server or vice versa? (I think header checksum would decide but don't know how)

asked Jan 14 in Computer Networks by Chirag Shilwant (170 points) | 12 views

+1 vote

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SELF DOUBT: COMPUTER NETWORKS FRAGMENTATION
Assume a datagram of length $5*10^3$ bytes needs to pass through five networks to reach its destination. The MTU’s of each network is 1000, 820, 850, 950 and 900 respectively. Then at destination how many datagrams has to reached and what is the offset value of 3rd fragment after fragmentation? Fragments should be 11 and offset should be 200 right? [closed]

asked Jan 14 in Computer Networks by Debapaul (656 points) | 11 views

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GO question: SELF DOUBT: FRAGMENTATION
Consider a network having a host P connected to another host Q via two routers RI and R2. P is connected to RI through a link that can support a maximum frame length of $1024 bytes$ including header of size $12 bytes$. RI is connected ... the headers) Shouldn't the ans be $948B?$ Here is the link to the question https://gateoverflow.in/101500/ip-fragmentation

asked Jan 14 in Computer Networks by Debapaul (656 points) | 13 views

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Made easy test series : TCP congestion window
Let the size of congestion window of TCP connection be 38 KB when a timeout occurs. The propagation time of the connection is 100 msec and the maximum segment size used is 2 KB. The time taken (in sec) by the TCP connection to get back to 37 KB congestion window is ______ What is the correct answer for above question?

asked Jan 14 in Computer Networks by vishal burnwal (125 points) | 26 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

asked Jan 13 in Computer Networks by vishal burnwal (125 points) | 37 views

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MADE EASY CN ADVANCE
Suppose a TCP message that contains 900B of data and 20B of TCP header is passed to IP code at host A for delivery to B. IP header is 20B Assume that link A-R1 has maximum frame size of 1024B including 14B frame header, link R1-R2 can support maximum ... length of the last fragments at each of the 3 three links respectively are 920 440 400 960 460 440 960 460 460 940 460 460

asked Jan 13 in Computer Networks by Debapaul (656 points) | 20 views

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Self doubt CN
Calculating Efficiency and throughput in case of Sliding window protocol- 1)when link is Half duplex. 2)link is Full duplex. Looking for approach in above case. Thank you!

asked Jan 13 in Computer Networks by tp21 (268 points) | 45 views

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#gate#networks
In which layer of OSI model does ARP and RARP operates?

answered Jan 11 in Computer Networks by priyesh9875 (59 points) | 31 views

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testbook full test 7
Consider an instance of TCP’s Additive increase multiplicative decrease algorithm where window size at the start of slow start phase is 4 MSS and threshold at the start of first transmission is 32 MSS .Assume that time out occurs during 6th transmission and start with 1 MSS.find congestion window at the end of 9th transmission

answered Jan 9 in Computer Networks by SuvasishDutta (166 points) | 68 views

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Made easy test series : TCP
Consider Three-way Handshaking for TCP connection termination is shown below: Which of the following is false? S1 : Loss of ACK from client doesn't effect on termination of connection. S2 : The client moves FIN-Wait-1 → FIN-Wait-2 → closed in ... machine on no packet loss. S3 : Loss of ACK from server restrict termination of connection. Can anyone tell about S1 and S3?

asked Jan 9 in Computer Networks by vishal burnwal (125 points) | 14 views

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What is the sequence number of pure ack. Last byte sequence no or last segment sequence number

asked Jan 8 in Computer Networks by Nayan Doshi (6 points) | 9 views

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ME Computer Network Test
In an RSA cryptosystem, the public key of a given user is $e=31$ and $n=3599.$ What is private key of the user? What will ans? and how do calculate it? [closed]

asked Jan 8 in Computer Networks by srestha (644 points) | 16 views

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Birthday attack (self doubt)
How is Birthday attack possible by third party as well as receiver if sender encrypts the message digest with his own private key for authentication?. This question is similar to https://gateoverflow.in/118295/gate2017-1-15 ? Thank you

asked Jan 7 in Computer Networks by Pratyush Priyam Kuan (778 points) | 12 views

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#congestion window size

asked Jan 6 in Computer Networks by sairam1622 (6 points) | 8 views

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FULL SYLLABUS TEST-7 (ADVANCE LEVEL) GATE 2019 Q37

asked Jan 6 in Computer Networks by DukeThunders (409 points) | 14 views

+1 vote

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SYLLABUS SELF DOUBT
Is $ALOHA$ in syllabus? I am facing repeated questions from aloha in made easy though that has not been covered in our syllabus in my coaching center. So is aloha in syllabus?

asked Jan 5 in Computer Networks by Debapaul (656 points) | 8 views

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MadeEasy Subject Test
What is the meaning of “two distinct webpages can be sent over the same persistent connection”?

asked Jan 4 in Computer Networks by Ansaaa24 (9 points) | 5 views

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ace test series computer network
In class C network with 3 bits subnetting(subnet ID all zero and one all is not allowed ). The last octet value (in decimal) of second last subnet, subnet ID is______

answered Jan 3 in Computer Networks by pranay562 (925 points) | 32 views

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ISRO - 2013 , Not getting the answer and why the answer [closed]

asked Jan 3 in Computer Networks by dr_Jackal (16 points) | 15 views

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Applied course test series : Fragmentation
What will be the correct answer for above question. Actually my answer and test series answer is not matching.

answered Jan 2 in Computer Networks by Priyansh Singh (255 points) | 22 views

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