Recent questions in Computer Networks

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1

Data modems
Please explain PCM and delta modulation technique.....

asked 1 day ago in Computer Networks by alokraj1142 (235 points) | 4 views

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2

Data modems
Please explain ASK,PSK and FSK keying ....

asked 1 day ago in Computer Networks by alokraj1142 (235 points) | 3 views

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1 answer

3

Gate Practice
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? A. 63 B. 110 C. 123 D. 145 how to solve

asked 2 days ago in Computer Networks by Pranav Madhani (153 points) | 17 views

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1 answer

4

CN practice question
Consider a MAN with server and destination of 20 km apart and one way delay is 2 minutes. At what data rate does RTT equals to transmission delay for 2 KB data? A. 41 bits/ sec B. 68.2 bps C. 69 bps D. 40 bps need solution

asked 2 days ago in Computer Networks by Pranav Madhani (153 points) | 15 views

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1 answer

5

lan techniques.
can anyone tell me how does the formula (min frame)Lmin = 2* tp(propagation delay) *B (bandwidth)came ?

asked 2 days ago in Computer Networks by Palash Moon (51 points) | 15 views

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1 answer

6

Computer Networks
Bandwidth =100 mbps. Calculate 1 bit delay???

asked 2 days ago in Computer Networks by supriya 1 (141 points) | 26 views

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1 answer

7

Differential Manchester Encoding . [closed]

asked 3 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 44 views

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1 answer

8

What is relation between bit rate and baud rate ?

asked 3 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 23 views

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2 answers

9

Name of Data Unit at different layers ?

asked 4 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 21 views

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1 answer

10

cn question
Which of the following addresses is used to deliver a message to the correct application program running on a host? (A) Port (B) IP (C) Logical (D) Physical

asked 4 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 23 views

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2 answers

11

Confusion in Differential Manchester Encoding

asked 4 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 38 views

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0 answers

12

Doubt on formula
in csma/cd which formula is right 1 .transmission delay >= 2 * propagation delay 2.transmission delay <= 2 * propagation delay

asked 4 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 18 views

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0 answers

13

IP addressing
The data link layer provides the host or Mac address. Network layer comes before physical layer at the sender side of OSI reference model. Then how can network layer can do Ip addressing which includes network as well as the host address?

asked 4 days ago in Computer Networks by MiNiPanda (99 points) | 15 views

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1 answer

14

Pure Aloha and Slotted Aloha
It am not getting the concept of vulnerable time. The frames are of same size so Tx is same and they propagate with same speed. If two objects are moving in the same direction with same constant speed then how can they collide?

asked 4 days ago in Computer Networks by MiNiPanda (99 points) | 12 views

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15

solve this please
17 * d = 1 mod 3120 please explain how to get d in these questions iam not getting it

asked 4 days ago in Computer Networks by sumit goyal 1 Junior (641 points) | 24 views

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1 answer

16

TCP congestion control
Case 1: If congestion window size=100MSS, rwnd=16MSS and RTT=1ms. Then how many time it will take to send full window? case2: If congestion window size=16MSS, rwnd=100MSS and RTT=1ms. Then how many time it ... window? How to decide intial threshold value when there is "congestion" or "no congestion" in the underlying network?

asked 6 days ago in Computer Networks by reena_kandari Loyal (3.2k points) | 28 views

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1 answer

17

Can any one explain this question only.

asked 6 days ago in Computer Networks by hem chandra joshi Junior (659 points) | 27 views

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1 answer

18

Computer Networks Tanenbaum
A noiseless 4-kHz channel is sampled every 1 msec. What is the maximum data rate? How does the maximum data rate change if the channel is noisy, with a signal-to-noise ratio of 30 dB?

asked 6 days ago in Computer Networks by targate2018 Junior (831 points) | 17 views

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19

Wireless LAN
A wireless LAN using DSSS with _______-bit chip code needs 320 MHz for sending data that originally required a 20-MHz bandwidth

asked 6 days ago in Computer Networks by Neeraj7375 Junior (567 points) | 8 views

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20

Wireless LAN
A wireless LAN using DSSS with a 4-bit chip code needs 10 MHz for sending data that originally required a _______-MHz bandwidth.

asked 6 days ago in Computer Networks by Neeraj7375 Junior (567 points) | 7 views

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0 answers

21

Wireless LAN
A wireless LAN using FHSS hops 10 times per cycle. If the bandwidth of the original signal is 10 MHz, the spread spectrum is _______ MHz.

asked 6 days ago in Computer Networks by Neeraj7375 Junior (567 points) | 2 views

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0 answers

22

Wireless LAN
An FHSS wireless LAN has a spread spectrum of 1 GHz. The bandwidth of the original signal is 250 MHz, and there are ______ hops per cycle

asked 6 days ago in Computer Networks by Neeraj7375 Junior (567 points) | 6 views

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0 answers

23

Wireless LAN
A wireless LAN using FHSS hops 10 times per cycle. If the bandwidth of the original signal is 10 MHz and 2 GHz is the lowest frequency, the highest frequency of the system is _______ GHz A) 1.0 B) 2.0 C) 2.1 D) 3.0

asked 6 days ago in Computer Networks by Neeraj7375 Junior (567 points) | 4 views

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1 answer

24

suggestion
Hardware and various devices used in networking .. should i study this topic for gate

asked 6 days ago in Computer Networks by sumit goyal 1 Junior (641 points) | 19 views

+1 vote

3 answers

25

Go back N (arq) protocol
Q. If maximum sequence number in Go back N ( arq) protocol is 'n' then window size (sender) is ? If your answer is 'n' or 'n'+1' then please design GBN for sender window 5 and 11 .

asked Jul 20 in Computer Networks by Abhi Som (49 points) | 47 views

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1 answer

26

Computer networks
Which of the following system calls not used in UDP echo server program? A) listen() B) socket() C) bind () D)recvfrom()

asked Jul 19 in Computer Networks by chandra sai (239 points) | 37 views

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1 answer

27

basic csma/cd
confusion ;- in csma/cd let there are many devices let the device wants to transmit a packet and channel is ideal than it will continue transfer the packet to channel. While during the transmission there is collision . Will the device do continuously transmit the packet or go to binary back off?

asked Jul 17 in Computer Networks by hem chandra joshi Junior (659 points) | 22 views

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1 answer

28

Doeacc DCN
The purpose of MTA(Mail Transfer Agent) is -------- A) Envelope preparation B) Message preparation C) Transfer of messages over the internet D) All of the above

asked Jul 16 in Computer Networks by Vikash Gupta (21 points) | 35 views

+1 vote

1 answer

29

What is the difference between link utilisation and efficiency (in regards of data link layer)?

asked Jul 15 in Computer Networks by prabhas44 (55 points) | 36 views

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1 answer

30

TDM access control method
Let transmission time = 1ms , propagation delay = 1 ms and we have used TDM access control method. What is the efficiency of the network and what is throughput if we are given a bandwidth of 4mbps. If we want to have N number of nodes/stations in this network and each requires 2kbps of bandwidth. Then what is the value of N ?

asked Jul 15 in Computer Networks by AnilGoudar Active (2.2k points) | 18 views

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