Recent questions and answers in Computer Networks - GATE Overflow

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2 answers

1

UGCNET-Dec2006-II: 29
The subnet mask $255.255.255.192$ Extends the network portion to 16 bits. Extends the network portion to 26 bits. Extends the network portion to 36 bits. Has no effect on the network portion of an IP address.

answered 17 hours ago in Computer Networks by immanujs Active (3.8k points) | 13 views

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1 answer

2

UGCNET-Dec2006-II: 28
The network $198.78.41.0$ is a : Class A Network Class B Network Class C Network Class D Network

answered 17 hours ago in Computer Networks by immanujs Active (3.8k points) | 9 views

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1 answer

3

NIELIT 2016 DEC Scientist B (CS) - Section B: 22
The structure or format of data is called: Syntax. Struct. Semantic. none of the above.

answered 1 day ago in Computer Networks by smsubham Boss (16.5k points) | 8 views

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1 answer

4

NIELIT 2016 DEC Scientist B (CS) - Section B: 20
Bluetooth is an example of: Personal area network. Virtual private network. Local area network. None of the above.

answered 1 day ago in Computer Networks by smsubham Boss (16.5k points) | 13 views

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1 answer

5

NIELIT 2016 DEC Scientist B (CS) - Section B: 19
Communication between a computer and a keyboard involves transmission Simplex. Half-Duplex. Automatic. Full-Duplex.

answered 1 day ago in Computer Networks by smsubham Boss (16.5k points) | 6 views

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1 answer

6

NIELIT 2016 DEC Scientist B (CS) - Section B: 9
The first network: ARPANET. NFSNET. CNNET. ASAPNET.

answered 1 day ago in Computer Networks by smsubham Boss (16.5k points) | 8 views

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7

NIELIT 2016 MAR Scientist B - Section C: 53
In context of TCP/IP computer network models, which of the following is FALSE? Besides span of geographical area, the other major difference between LAN and WAN is that the later uses switching element. A repeater is used just to forward ... to another one. IP layer is connected oriented layer in TCP/IP. A gateway is used to connect incompatible networks.

asked 2 days ago in Computer Networks by Lakshman Patel RJIT Veteran (61.3k points) | 3 views

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0 answers

8

NIELIT 2016 MAR Scientist B - Section C: 54
Which of the following is not a transceiver function? Transmission and receipt of data. Checking of line voltages. Addition and subtraction of headers. Collision detection.

asked 2 days ago in Computer Networks by Lakshman Patel RJIT Veteran (61.3k points) | 3 views

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0 answers

9

NIELIT 2016 MAR Scientist B - Section C: 55
A packet switching network is free. can reduce the cost of using an information utility. allows communications channel to be shared among more than one user. both (B) and (C).

asked 2 days ago in Computer Networks by Lakshman Patel RJIT Veteran (61.3k points) | 5 views

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0 answers

10

NIELIT 2016 DEC Scientist B (CS) - Section B: 25
A low pass filter is: Passes the frequencies lower than the specified cutoff frequency. Used to recover signal from sampled signal. Rejects higher frequencies. All of the above.

asked 2 days ago in Computer Networks by Lakshman Patel RJIT Veteran (61.3k points) | 6 views

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11

UGCNET-Dec2007-II: 4
Let e : B^m → B^n is a group code. The minimum distance of ‘e’ is equal to : the maximum weight of a non zero code word. the minimum weight of a non zero code word. m n

asked 5 days ago in Computer Networks by jothee Veteran (107k points) | 16 views

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12

UGCNET-Dec2007-II: 26
The best known example of a MAN is : Ethernet. Cable Television. FDDI. IEEE $802.3$.

asked 5 days ago in Computer Networks by jothee Veteran (107k points) | 14 views

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13

UGCNET-Dec2007-II: 27
In a broadcast network, a layer that is often thin or non-existent is : network layer. transport layer. presentation layer. application layer.

asked 5 days ago in Computer Networks by jothee Veteran (107k points) | 9 views

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0 answers

14

UGCNET-Dec2007-II: 28
The maximum data rate of binary signals on a noiseless $3\:KHz$ channel is : $3000$ bps. $6000$ bps. $9000$ bps. $12,000$ bps.

asked 5 days ago in Computer Networks by jothee Veteran (107k points) | 9 views

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15

UGCNET-Dec2007-II: 29
For pure ALOHA, the maximum channel utilization is : $100\%$ $50\%$ $36\%$ $18\%$

asked 5 days ago in Computer Networks by jothee Veteran (107k points) | 9 views

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0 answers

16

UGCNET-Dec2007-II: 30
An example of an adaptive routing algorithm is : distance vector routing. flooding. selective flooding. shortest path routing.

asked 5 days ago in Computer Networks by jothee Veteran (107k points) | 7 views

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2 answers

17

#Wifi
In 802.11 MAC layer, robustness is provided by 1. CRC Checksum 2. Packet fragmentation 3. RTS control frame 4. NAV

answered 5 days ago in Computer Networks by akshay7797 Junior (505 points) | 62 views

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0 answers

18

UGCNET-Dec2006-II: 26
How many DS1 signals are transported on a DS3 signal ? $24$ $672$ $14$ $28$

asked 6 days ago in Computer Networks by jothee Veteran (107k points) | 10 views

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0 answers

19

UGCNET-Dec2006-II: 27
A $10\:\text{BASE-}2$ network is limited to : $20$ bytes per data field. $30$ stations per segment. $40$ segments. $50$ feet of cable.

asked 6 days ago in Computer Networks by jothee Veteran (107k points) | 11 views

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0 answers

20

UGCNET-Dec2004-II: 26
Error control is needed at the transport layer because of potential error occuring __________. from transmission line noise. in router. from out of sequency delivery. from packet losses.

asked Mar 26 in Computer Networks by jothee Veteran (107k points) | 11 views

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21

UGCNET-Dec2004-II: 27
Making sure that all the data packets of a message are delivered to the destination is _________ control. Error. Loss. Sequence. Duplication.

asked Mar 26 in Computer Networks by jothee Veteran (107k points) | 10 views

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22

UGCNET-Dec2004-II: 28
Which transport class should be used with a perfect network layer ? $TP0$ and $TP2.$ $TP1$ and $TP3.$ $TP0, TP1, TP3.$ $TP0, TP1, TP2, TP3, TP4.$

asked Mar 26 in Computer Networks by jothee Veteran (107k points) | 11 views

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0 answers

23

UGCNET-Dec2004-II: 29
Which transport class should be used with residual-error network layer ? $TP0, TP2.$ $TP1, TP3$ $TP1, TP3, TP4$. $TP0, TP1, TP2, TP3, TP4.$

asked Mar 26 in Computer Networks by jothee Veteran (107k points) | 4 views

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24

UGCNET-Dec2004-II: 30
Virtual circuit is associated with a __________ service. Connectionless. Error-free. Segmentation. Connection-oriented.

asked Mar 26 in Computer Networks by jothee Veteran (107k points) | 9 views

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1 answer

25

Andrew S. Tanenbaum Edition 5th Exercise 3 Question 4 (Page No. 252)
What is the maximum overhead in byte-stuffing algorithm?

answered Mar 24 in Computer Networks by cs5sam (11 points) | 38 views

+7 votes

3 answers

26

ISRO2015-51
How many characters per sec (7 bits + 1 parity) can be transmitted over a 2400 bps line if the transfer is synchronous ( 1 start and 1 stop bit)? 300 240 250 275

answered Mar 23 in Computer Networks by topper98 Junior (589 points) | 6k views

+2 votes

2 answers

27

UGCNET-Dec2013-III-47
The start and stop bits are used in serial communication for error detection error correction synchronization slowing down the communication

answered Mar 23 in Computer Networks by topper98 Junior (589 points) | 1.2k views

+7 votes

4 answers

28

ISRO2007-19
Assume that each character code consists of 8 bits. The number of characters that can be transmitted per second through a synchronous serial line at 2400 baud rate, and with two stop bits is 109 216 218 219

answered Mar 23 in Computer Networks by topper98 Junior (589 points) | 3.1k views

0 votes

3 answers

29

nielit 2017 82
If origional size of data is 40 then after adding error detection redundancy bit size of data length is: a. 26 b.36. c. 46 d. 56

answered Mar 21 in Computer Networks by topper98 Junior (589 points) | 223 views

+2 votes

3 answers

30

ISRO2020-53
The persist timer is used in TCP to To detect crashes from the other end of the connection To enable retransmission To avoid deadlock condition To timeout FIN_WAIT$1$ condition

answered Mar 20 in Computer Networks by smsubham Boss (16.5k points) | 244 views

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4 answers

31

NIELIT-DEC 2017 -SET C-65
When we use slow start algorithm ,the size of CW increases ...............until it reaches threshold. A)Additively B)Multiplicatively C)Exponentially D) NONE

answered Mar 19 in Computer Networks by Vipin Tiwari (219 points) | 154 views

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2 answers

32

NIELIT Scientist-B Dec 2017_13
If the number of networks and number of hosts in class B are 2m, (2n-2) respectively. Then the relation between m, n is : (A) 3m=2n (B)7m=8n (C)8m=7n (D)2m=3n

answered Mar 19 in Computer Networks by topper98 Junior (589 points) | 289 views

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2 answers

33

Kurose and Ross Edition 6 Exercise 3 Question R8 (Page No 286)
Suppose that a Web server runs in Host C on port 80. Suppose this Web server uses persistent connections and is currently receiving requests from two different Hosts, A and B. Are all of the requests being sent through the ... If they are being passed through different sockets, do both of the sockets have port 80? Discuss and explain.

answered Mar 7 in Computer Networks by smsubham Boss (16.5k points) | 63 views

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1 answer

34

transport layer
what happens when a host receives a TCP segment whose port number or source IP address do not match with any of the ongoing sockets in the host? one of the answer i think is an ICMP destination unreachable message will be transmitted. but could it be a ... listening to that port?(in case of no ongoing port of the number). how the answer would change in case of UDP connection.

answered Mar 6 in Computer Networks by smsubham Boss (16.5k points) | 89 views

+1 vote

1 answer

35

Andrew S. Tanenbaum Edition 5th Exercise 6 Question 15 (Page No. 607)
Why does UDP exist? Would it not have been enough to just let user processes send raw IP packets

answered Mar 6 in Computer Networks by smsubham Boss (16.5k points) | 34 views

+1 vote

2 answers

36

Computer Networks
In TCP checksum is mandatory but in UDP checksum is optional. Why ?

answered Mar 6 in Computer Networks by smsubham Boss (16.5k points) | 224 views

0 votes

1 answer

37

Wifi : Syllabus
What are the important topics in WIFI : It would be very helpful if some one answered this thank you:)

answered Mar 6 in Computer Networks by smsubham Boss (16.5k points) | 171 views

+2 votes

1 answer

38

Data communication and networking by forouzan 12.7 Exercise
11. We have a pure ALOHA network with 100 stations. If $T_{fr} = 1 \mu s$, what is the number of frames each station can send to achieve the maximum efficiency. 12. Repeat Exercise 11 for slotted ALOHA.

answered Mar 2 in Computer Networks by shashankpal (11 points) | 140 views

+20 votes

4 answers

39

GATE2004-IT-22
Which one of the following statements is FALSE? Packet switching leads to better utilization of bandwidth resources than circuit switching Packet switching results in less variation in delay than circuit switching Packet switching requires more per-packet processing than circuit switching Packet switching can lead to reordering unlike in circuit switching

answered Feb 29 in Computer Networks by JashanArora Loyal (8.3k points) | 4k views

+1 vote

3 answers

40

GATE2020-CS-38
An organization requires a range of IP address to assign one to each of its $1500$ computers. The organization has approached an Internet Service Provider (ISP) for this task. The ISP uses CIDR and serves the requests from the available IP address space $202.61.0.0/17$. The ISP wants ... $202.61.64.0/21$ $202.61.144.0/21$ I and II only II and III only III and IV only I and IV only

answered Feb 29 in Computer Networks by Krishnahs (143 points) | 1.5k views

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