Recent questions and answers in Computer Networks

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Self doubt regarding error control
Is 2D parity scheme for error control techniques in GATE CSE 2020 Syllabus? Because in 2008 IT paper it was asked? Do i need to practice the questions related to the concept of 2D parity??

asked 1 day ago in Computer Networks by vg653 (104 points) | 6 views

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on which interface will an IP packet with destination address 144.25.64.120 be forwarded

asked 2 days ago in Computer Networks by Jayasoorya (103 points) | 7 views

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Computer Networking ,A top down approach by Kurose and Ross,Ethernet topics,self doubt

asked 4 days ago in Computer Networks by PRANAB NANDY (67 points) | 4 views

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kurose 6th edition chapter- multiple access protocols, page 447

asked 6 days ago in Computer Networks by ayush.5 (110 points) | 4 views

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GATE2017-1-45 Computer Network Self Doubt
https://gateoverflow.in/118328/gate2017-1-45. Here the overhead bytes is added in both information frame and acknowledge frame. While https://www.geeksforgeeks.org/gate-gate-cs-2017-set-1-question-47/ Here the overhead bytes is subtracted. So what will be the correct whether we have to add the overhead bytes or to subtract the overhead bytes

asked 6 days ago in Computer Networks by kd..... (106 points) | 3 views

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#self_doubt #acknowledgement_in_DLL
When a frame is received by a router, does DLL in it send acknowledgement to sending router(previous hop router) DLL ?

asked Aug 12 in Computer Networks by ayush.5 (110 points) | 6 views

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Ace booklet question
If IP is 1 0 3 2 5 4 7 6 then what is $IP^{-1}$

answered Aug 11 in Computer Networks by user2525 (1.6k points) | 13 views

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LEAKY BUCKET ALGORITHM
Suppose a system has 50MB data to send on a network and transmit the data in burst at 8Mbps, the maximum transmission rate across routers in the network is 6Mbps,if system uses leaky bucket algorithm, the capacity(in MB) that bucket must hold so that no data is discarded is______(upto 1 decimal place)

answered Aug 9 in Computer Networks by user2525 (1.6k points) | 8 views

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Computer Networks - Wifi
Suppose that a 10-Mbps 802.11b LAN is transmitting 128- bytes frames back to back over radio channel with a bit error of 10^-5. How many frames per second will be damaged on average?

answered Aug 7 in Computer Networks by user2525 (1.6k points) | 11 views

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Computer Network - traffic shaping
Computer A has 19.5 MB to send on a network and transmits the data in burst 6 Mbps. The maximum transmission rate across router in the network is 4Mbps. If Computer A transmission is shaped using a leaky bucket, how much capacity(Mb) must the queue in the bucket hold not to discard any data?

answered Aug 7 in Computer Networks by user2525 (1.6k points) | 12 views

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ALOHA QUESTION
Consider a slotted aloha with 2Mbps ethernet, what is the throughput (in kbps) for slotted aloha at G=3_______(upto1 decimal place)

answered Aug 7 in Computer Networks by user2525 (1.6k points) | 17 views

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Computer Networks overhead question
Assuming that, for given network layer implementation, connection establishment overheads are 100 bytes and disconnection are 28 bytes, what would be the minimum size of a packet the transport layer needs to keep if it wishes to implement a datagram ... its overhead to a maximum of 12.5%. Ignore transport layer overheads. 512 bytes 768 bytes 1152 bytes 1024 bytes

answered Aug 7 in Computer Networks by user2525 (1.6k points) | 12 views

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Computer network tcp
Consider a tcp connection is established between from host A to host B between processes P1 abnd P2 running. MSS = 800 bytes. Consider an instant when threshold at P1 is 8000 bytes. Then, P1 receives an ACK. After reception and processing of this ACK, the ... . What was the congestion window at time, i.e. before the ACK was processed? 6400 bytes 7200 bytes 8000 bytes 8800 bytes

asked Aug 6 in Computer Networks by sagar2405 (192 points) | 2 views

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Computer Networks TCP
Consider a TCP based protocol over 40 Gbps; A single TCP connection is allowed to use all the available bandwidth. How long wraparound occurs in sec?

answered Aug 5 in Computer Networks by user2525 (1.6k points) | 5 views

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Computer Networks
Consider host A wants to transmits a 25000 bytes long file to host B using TCP. If MSS is 1000 bytes and slow start threshold is 16 MSS. How many RTT it will take to transmits the complete file?

asked Aug 5 in Computer Networks by sagar2405 (192 points) | 3 views

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Computer network
let window size be w at the beginning of RTT. assuming there is no losses in RTT.what are respective window sizes for slow start and congestion.avoidance after completion of RTT.

asked Aug 5 in Computer Networks by Sonali_ (102 points) | 4 views

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Foruzan Mac Sublayer
Please explain and answer Question from Foruzan, Chap-12 Mac Sublayer

asked Aug 3 in Computer Networks by Nishi Agarwal (115 points) | 3 views

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Ace Test series : Computer Networks ( Packetization )

answered Aug 2 in Computer Networks by Hirak (1.3k points) | 24 views

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Computer networks - Sliding window protocol
Consider two host connected to each other over 1Mbps link where distance between them is 10,000 km and propagation speed is 2*10^8 m/s. If frame size 1000 Byte and window size is 5. What is maximum achievable throughput if ack are always piggybacked?

answered Aug 1 in Computer Networks by user2525 (1.6k points) | 18 views

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Computer Networks Sliding Window Window Size
Station ‘A’ uses 64 Byte packets to transmit messages to station ‘B’ using a sling window protocol. The round trip delay between A and B is 80 milliseconds and the bottleneck bandwidth on the path between ‘A’ and ‘B’ is 128 Kbps. What is the sender window size for maximum efficiency?

answered Aug 1 in Computer Networks by user2525 (1.6k points) | 12 views

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Computer Networks Sliding Window Problem
A 3000 km long trunk operates at 1.536 Mbps and it is used to transmit 64 Bytes frames. If it uses sliding window protocol then what is the number required sequence numbers. Assume propagation speed of 8 microsec/ km? What is the number of sequence bits used in above question (Number of bits used for sequence number) ?

answered Aug 1 in Computer Networks by Hirak (1.3k points) | 12 views

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Computer Networks Sliding Window
A is sending data to host B over a full duplex link. A and B are using the sliding window protocol for few control. The send and receive window size are four(4) packets each. Data packets (sent only from A to B) are ... require very negligible time. The propagation delay over the link is 170 µseconds. What is the maximum achievable throughput in the communication?

asked Aug 1 in Computer Networks by DukeThunders (208 points) | 3 views

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fssai IT assistant exam 2019 Q18
Which of the given options best describes the truthfulness of the following statements? 1. Address Resolution Protocol (ARP) finds the MAC Address from the corresponding IP Address. 2. Count to Infinity is a drawback of distance vector routing protocol. (i) false (ii) true (i) true (ii) false (i) false (ii) false (i) true (ii) true

answered Jul 31 in Computer Networks by Arnabh Gangwar (183 points) | 16 views

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Computer network - TCP
Suppose you wanted to implement a transaction from a remote client to server in TCP, what is the minimum delay to complete one transaction? 1RTT 2RTT 2.5RTT 3RTT

answered Jul 31 in Computer Networks by user2525 (1.6k points) | 14 views

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Computer Networks - TCP
If a TCP server was to simultaneously support N clients, how many sockets would the TCP server need? 1 2 N N+1 Please answer the above question for UDP also.

answered Jul 30 in Computer Networks by user2525 (1.6k points) | 8 views

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Computer network - TCP
There are two nodes on a network C and S. C is client and S is server. C wants to connect to S and send a message that is 35KB long using TCP. Assume that a single packet can hold up a 2KB of data ans the headers are negligibly ... start stage, initially SSthresh = 32KB and that there is no packet loss. At what time will the server finish receiving the message from client?

asked Jul 30 in Computer Networks by sagar2405 (192 points) | 9 views

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Computer Networks - Test series
Consider that at time t, a TCP connections has a congestion window of 4000 bytes. The maximum segment size used by the connection is 1000 bytes. What is the congestion window(in bytes) after it send out 4 packets and receive acks for all of them? Suppose thre is one ack per packet. If the connection is in slow start? If the connection is in congestion avoidance?

asked Jul 30 in Computer Networks by sagar2405 (192 points) | 1 view

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Computer Networks - UDP and TCP doubt
UDP provides error control mechanism. According to me, statement is false because it uses checksum to detect errors but it cannot control it unlike TCP. Is my statement correct ? If not please give appropriate reasons for the answer of the given statement.

asked Jul 30 in Computer Networks by user2525 (1.6k points) | 4 views

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Persistent and non-persistent CSMA
Consider A lives in Delhi, connected to the internet via a 100 Mbps connection retrieve a 250 KB webpage from server in Chennai where page contain 3 images of 500 KB each. Assume one way propagation delay is 75ms and A's access link is ... and T2? Can anyone show how to approoach for both ? Ref : https://gateoverflow.in/284688/persistent-and-non-persistent-http

asked Jul 29 in Computer Networks by user2525 (1.6k points) | 3 views

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Access Control:CSMA/CD
In CSMA/CD protocol in order to detect collision Transmission time should be at least equal to two times Tp, that means we have to change the frame size accordingly. Instead of all this why can't we just place a timer with a time limit of 2 Tp, If ... to retransmit. This sounds easier for me as we need not append any additional bits to the frame, Correct me if I am wrong.

asked Jul 29 in Computer Networks by Arthik Vishwakarma (102 points) | 6 views

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Go back N Numerical
A 3000-km-long T1 trunk is used to transmit a 64-byte frame. Assume the propagation speed is 6microsec/km. (Note that the data rate for T1 carries is 1.544 Mbps). If go-back-N protocol is used,in order to achieve an efficiency of 100%. What is the maximum number of bits of the sequence number?

asked Jul 27 in Computer Networks by sagar2405 (192 points) | 3 views

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Go-back-N Numerical
Two stations communicate on a 50Kbps satellite channel (ground to ground propagation delay of 270 msec) using 10,000 byte frame and a Go back N protocol with 5-bit sequence numbers. Assuming that frame error probability is 0.15, determine the maximum data rate from A to B. 50 Kbps 40.45 Kbps 45.40 Kbps 45.45 Kbps

asked Jul 26 in Computer Networks by sagar2405 (192 points) | 7 views

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Ethernet Numerical
There are 200 Computers in a lab. They are attached to an Ethernet( R = 10 Mbps) of length d = 1500m. The transmitted packets are L = 800 bits long. The propagation speed is V = 2*10^8 m/sec. What will be the average speed achieved by every station? (in Kbps)

asked Jul 26 in Computer Networks by sagar2405 (192 points) | 7 views

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Sliding window protocol Numerical
Consider two nodes, A and B. Suppose the network path from A to B has a bandwidth of 5KB/s and a propagation time of 120ms. The path in the reverse direction, from B to A, has a bandwidth of 10KB/s and a propagation time of 80ms. Let the ... 500 bytes and ACK packet have a size of 100 bytes. What is the optimal window size with sliding window protocol? 4 3 5 None

answered Jul 26 in Computer Networks by user2525 (1.6k points) | 12 views

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Point to Point Protocol
How Point to Point protocol provides connection oriented services ?

asked Jul 22 in Computer Networks by user2525 (1.6k points) | 7 views

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Can someone list the commands of different protocols to study in computer Networks?

asked Jul 22 in Computer Networks by DarkAstra (102 points) | 3 views

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A complete guide to the gate by Pearson, computer network excercise 3 question no. 4

asked Jul 22 in Computer Networks by karanvashisht1026 (102 points) | 9 views

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GradeUp App 2019 practice question
You have a class B network 172.16.0.0. You use 11 bits for subnetting. Which of the following is a correct range of IP addresses that belongs to the same network ? 255.255.8.1 to 255.255.14.254 255.255.255.9 to 255.255.255.14 255.255.17.1 to 255.255.22.254 255.255.17.0 to 255.255.22.255

asked Jul 21 in Computer Networks by tarang1998 (102 points) | 5 views

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Token Passing
Do we have Token Passing Access Control Method in syllabus of GATE?

asked Jul 21 in Computer Networks by Shivateja MST (127 points) | 4 views

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Create an IPv4 addressing scheme and assign IPv4 addresses to devices in a home network.

answered Jul 21 in Computer Networks by avistein (291 points) | 40 views