Recent questions tagged computer-networks / GATE Overflow for GATE CSE

0 votes

2 answers

2071

MadeEasy Subject Test: Computer Networks - IP Addressing

nandini gupta

528 views

nandini gupta asked Jan 31, 2017

0 votes

1 answer

2072

TesT series question
what is the remainder when 4^250 is divided by 14 2^500 /14 = 2^499 / 7 Applying fermats theorem 2^6 mod 7 =1 (2^498 * 2 ) / 7 = remainder should be 2 is it correct???

what is the remainder when 4^250 is divided by 142^500 /14 = 2^499 / 7 Applying fermats theorem 2^6 mod 7 =1 (2^498 * 2 ) / 7 = remainder should be 2 is i...

bad_engineer

869 views

bad_engineer asked Jan 31, 2017

0 votes

5 answers

2073

UGC NET CSE | January 2017 | Part 3 | Question: 28
In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is 2 bytes 1 byte 4 bytes 5 bytes

In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packe...

go_editor

4.9k views

go_editor asked Jan 31, 2017

1 votes

5 answers

2074

UGC NET CSE | January 2017 | Part 3 | Question: 25
Suppose there are N stations in a slotted LAN. Each station attempts to transmit with a probability P in each time slot. The probability that only one station transmits in a given slot is____ $nP(1-P)^{n-1}$ $nP$ $P(1-P)^{n-1}$ $n^P (1-P)^{n-1}$

Suppose there are N stations in a slotted LAN. Each station attempts to transmit with a probability P in each time slot. The probability that only one station transmits i...

go_editor

1.9k views

go_editor asked Jan 31, 2017

0 votes

1 answer

2075

COMPUTER NETWORKS CHANNEL CAPACITY
IS CHANNEL CAPACITY OF FULL DUPLEX LINK= 2*TP*BANDWIDTH AND CHANNEL CAPACITY OF HALF DUPLEX LINK= TP*BANDWIDTH ?? TP=PROPAGATION DELAY. AM I RIGHT??

IS CHANNEL CAPACITY OF FULL DUPLEX LINK= 2*TP*BANDWIDTHANDCHANNEL CAPACITY OF HALF DUPLEX LINK= TP*BANDWIDTH ??TP=PROPAGATION DELAY.AM I RIGHT??

sushmita

2.0k views

sushmita asked Jan 31, 2017

0 votes

1 answer

2076

madeeasy

sidsunny

333 views

sidsunny asked Jan 29, 2017

1 votes

1 answer

2077

Ethernet
In standard ethernet with transmission rate of 20 Mbps, the length of the cable is 2500 m and the size of a frame is 1024 bits. The propagation speed of a signal in a cable is $2 \times 10^8$ m/s. The percentage of the time medium is occupied but not used by a station is?

In standard ethernet with transmission rate of 20 Mbps, the length of the cable is 2500 m and the size of a frame is 1024 bits. The propagation speed of a signal in a cab...

Supremo

2.7k views

Supremo asked Jan 29, 2017

1 votes

0 answers

2078

Test Series Question
Suppose host A is sending a large file to host B over a TCP connection. The two end hosts are 10msec apart connected by a 1Gbps link. Assume that they are using a packet size of 1000 bytes to transmit the file. Also assume for ... utilization to be greater than 80%? Why Does this formula doesn't work here N(efficiency) = Transmission/(Transmission + 2*Propagation)

Suppose host A is sending a large file to host B over a TCP connection. The two end hosts are 10msec apart connected by a 1Gbps link. Assume that they are using a packet ...

bad_engineer

228 views

bad_engineer asked Jan 28, 2017

2 votes

1 answer

2079

Number of RTTs
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 KB. The receiver advertise its window at the starting of communication to be 24 KB. Assume the size of ... says 10rtts since after 9 RTTs we would be able to send full 24kb window Can somebody provide some refrence links for this

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 KB. The receiver ad...

Pankaj Joshi

1.1k views

Pankaj Joshi asked Jan 28, 2017

0 votes

0 answers

2080

Computer network DS-SS (Direct sequence spread spectrum) question.
How much is the interference rejection of the BPSK DS-SS if fb=10 Kbits/sec and fc=2 Mbits/sec? How much is the BER of this system if the practical BPSK modulation has 1db degradation from ideal performance? a)Assume that ... such a high Eb/No system. b)Assuming three independent equal power DS-SS signals and available Eb/No=12 db.

How much is the interference rejection of the BPSK DS-SS if fb=10 Kbits/sec and fc=2 Mbits/sec? How much is the BER of this system if the practical BPSK modulation has 1d...

Pratap

346 views

Pratap asked Jan 28, 2017

0 votes

1 answer

2081

aloha
6000 stations are competing for use of single slotted aloha channel. The average station makes 30 requests/hr ,where each request is for 500 us(micro sec) duration. calculate normalized total traffic on channel

6000 stations are competing for use of single slotted aloha channel. The average station makes 30 requests/hr ,where each request is for 500 us(micro sec) duration. calcu...

Pratap

833 views

Pratap asked Jan 27, 2017

0 votes

2 answers

2082

slotted aloha
measurements of a slotted aloha channel shows that 20% of slots are idle. 1.what is normalized total traffic in channel? 2.what is normalized throughput?

measurements of a slotted aloha channel shows that 20% of slots are idle.1.what is normalized total traffic in channel?2.what is normalized throughput?

Pratap

1.2k views

Pratap asked Jan 27, 2017

0 votes

2 answers

2083

What is the minimum number of wires required in serial communication?
What is the minimum number of wires required in serial communication? a. 4 b. 2 c. 3 d. 8

What is the minimum number of wires required in serial communication?a. 4b. 2c. 3d. 8

sh!va

552 views

sh!va asked Jan 27, 2017

0 votes

3 answers

2084

calculate the maximum window size
Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size? (a) 4 (b) 15 (c) 8 (d) 16.

Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size? (a) 4(b) 15 (c) 8(d) 16.

sh!va

13.3k views

sh!va asked Jan 27, 2017

0 votes

1 answer

2085

Find the maximum achievable data rate
The signal to noise ratio for a voice grade line is 30.1 dB (decibels) or a power ratio of 1023: 1. The maximum achievable data rate on this line whose spectrum ranges from 300 Hz to 4300 Hz is (a) 6200 bps (b) 9600 bps (c) 34000 bps (d) 31000 bps.

The signal to noise ratio for a voice grade line is 30.1 dB (decibels) or a power ratio of 1023: 1.The maximum achievable data rate on this line whose spectrum ranges fro...

sh!va

1.7k views

sh!va asked Jan 27, 2017

0 votes

1 answer

2086

Encoding manchester and differential manchester
Please provide manchester and differential manchester encoding of the following signal

Please provide manchester and differential manchester encoding of the following signal

dd

3.9k views

dd asked Jan 27, 2017

0 votes

1 answer

2087

CIDR (Classless Inter Domain Routing): Select correct statement
CIDR (Classless Inter Domain Routing)– 1. It is used in class C Networks 2. It is used in class B Networks 3. It is used in class A Networks 4. All of the above

CIDR (Classless Inter Domain Routing)–1. It is used in class C Networks2. It is used in class B Networks3. It is used in class A Networks4. All of the above

sh!va

769 views

sh!va asked Jan 26, 2017

0 votes

0 answers

2088

[Computer Network] Sliding window General doubt Tanenbaum p-333
To find an appropriate value for w we need to know how many frames can fit inside the channel as they propagate from sender to receiver. This capacity is determined by the bandwidth in bits/sec multiplied by the one- ... delay product means that time it takes first bit to reach receiver to the first frame to reach receiver?Please help

To find an appropriate value for w we need to know how many frames can fitinside the channel as they propagate from sender to receiver. This capacity is determinedby the ...

rahul sharma 5

615 views

rahul sharma 5 asked Jan 26, 2017

1 votes

1 answer

2089

Local Area Network

Rahul Jain25

1.1k views

Rahul Jain25 asked Jan 25, 2017

3 votes

1 answer

2090

Virtual Gate Test Series: Computer Networks - Bandwidth
Consider data frames consisting of $20$ header and $1980$ data bits. Assume headers and retransmissions are overhead, ACK frames are negligible and NAK frames are $20$ bits. The error rate for data frames is $2$ percent and the error rate for NAK frames is negligible. ... that is wasted on overhead. $(A) 2\%$ $(B) 98\%$ $(C) 97\%$ $(D) 3\%$

Consider data frames consisting of $20$ header and $1980$ data bits. Assume headers and retransmissions are overhead, ACK frames are negligible and NAK frames are $20$ bi...

Tendua

404 views

Tendua asked Jan 25, 2017

3 votes

1 answer

2091

MADE EASY TEST SERIES
Computer A has 30 MB to send on a network and transmits the data in burst at 6 Mbps. The maximum transmission rate across routers in the network is 4 Mbps. If computer A’s transmission is shaped using a leaky bucket. The capacity that the queue in the bucket must hold so that no data is discarded is ______ (in MB) upto 1 decimal place.

Computer A has 30 MB to send on a network and transmits the data in burst at 6 Mbps. The maximum transmission rate across routers in the network is 4 Mbps. If computer A�...

User007

5.2k views

User007 asked Jan 25, 2017

1 votes

2 answers

2092

Virtual Gate Test Series: Computer Networks - Sliding Window
What is send as ack in sliding window? The next packet which the sender want to received or the packet right now sender received? I think the sender send the ack as the packet it has got right now. ? In sliding window protocol, sender's window size is ... $(B)$ Frame $n-1$ $(C)$ Frames $0$ to $n$ $(D)$ Frames $0$ to $n-1$

What is send as ack in sliding window? The next packet which the sender want to received or the packet right now sender received?I think the sender send the ack as the pa...

Tendua

1.3k views

Tendua asked Jan 25, 2017

1 votes

0 answers

2093

Query
I am having problems understanding these inequalities with regard to TCP connection. Receiving side LastByteRcvd - NextByteRead <= MaxRcvBuffer AdvertisedWindow = MaxRcvBuffer - (LastByteRcvd - NextByteRead) Sending side LastByteSent -LastByteAcked <= AdvertisedWindow ... -LastByteAcked) + y > MaxSendBuffer Please either explain yourself or provide some useful link. Thank you.

I am having problems understanding these inequalities with regard to TCP connection.Receiving sideLastByteRcvd - NextByteRead <= MaxRcvBufferAdvertisedWindow = MaxRcvBu...

itachi

349 views

itachi asked Jan 25, 2017

2 votes

2 answers

2094

Transport Layer
Solution for Q1 ,Q2?

Solution for Q1 ,Q2?

Shubham Sharma 2

1.4k views

Shubham Sharma 2 asked Jan 25, 2017

0 votes

1 answer

2095

tcp frame
Suppose a server transmits one frame of a video every second, and the client starts playing the video at one frame per second as soon as the first frame arrives. Suppose the first ten frames arrive at times 0, 1.2, 1.99, 4.17, 4.01, 5.03, 8.05, 7.50, 8.90, 8.99, all in seconds. Which frames reach the client too late for playout? (A) 7 (B) 3 (C) 6 (D) 5

Suppose a server transmits one frame of a video every second, and the client starts playing the video at one frame per second as soon as the first frame arrives. Suppose ...

indrajeet

711 views

indrajeet asked Jan 25, 2017

2 votes

1 answer

2096

WIFI madeeasy

vaishali jhalani

2.4k views

vaishali jhalani asked Jan 24, 2017

6 votes

1 answer

2097

Test by Bikram | Mock GATE | Test 2 | Question: 48
An Internet Service Provider $(ISP)$ is granted a block of addresses starting with $145.75.0.0/16$. The $ISP$ needs to distribute these addresses to three groups of customers as follows: The first group has $128$ customers; each needs $256$ addresses. The ... $145.75.159.192/26$, $16384$ $145.75.159.192/26$, $32768$ $145.75.191.128/25$, $16384$

An Internet Service Provider $(ISP)$ is granted a block of addresses starting with $145.75.0.0/16$. The $ISP$ needs to distribute these addresses to three groups of cust...

Bikram

809 views

Bikram asked Jan 24, 2017

0 votes

2 answers

2098

Test by Bikram | Mock GATE | Test 2 | Question: 23
Suppose a user turns on a computer, starts a browser, types http://www.google.com, and hits ENTER. Which of the following protocols would probably not be used at any point to serve this request? $IP$ $TCP$ $UDP$ $SMTP$

Suppose a user turns on a computer, starts a browser, types http://www.google.com, and hits ENTER.Which of the following protocols would probably not be used at any point...

Bikram

355 views

Bikram asked Jan 24, 2017

2 votes

1 answer

2099

Test by Bikram | Mock GATE | Test 2 | Question: 3
Which of the following will definitely result in datagram fragmentation ? Transmitting over a circuit-switched network Transmitting datagrams with more than $4$ $bytes$ in the $IP$ header Transmitting over a packet-switched network Transmitting datagrams longer than the physical layer’s maximum transmission unit

Which of the following will definitely result in datagram fragmentation ? Transmitting over a circuit-switched network Transmitting datagrams with more than $4$ $byt...

Bikram

434 views

Bikram asked Jan 24, 2017

3 votes

2 answers

2100

Test by Bikram | Mock GATE | Test 2 | Question: 1
A manufacturer of Bio-Medical equipment company needs to deal with the problem of occasional random bit flips in opcodes due to radiation. Which of the following statements is/are true? The minimum Hamming distance required to detect d errors is d + 1. The minimum ... d errors is 3 * d + 1. I only I, II, and III II and III only I and II only

A manufacturer of Bio-Medical equipment company needs to deal with the problem of occasional random bit flips in opcodes due to radiation.Which of the following statement...

Bikram

566 views

Bikram asked Jan 24, 2017

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