Recent questions and answers in Computer Networks

0 votes

2 answers

1

UGCNET-June-2019-II-84
You need $500$ subnets, each with about $100$ unusable host address per subnet. What network mask will you assign using a class B network? $255.255.255.252$ $255.255.255.128$ $255.255.255.0$ $255.255.254.0$

answered 19 hours ago in Computer Networks by abhishekmehta4u Boss (34.2k points) | 19 views

+19 votes

4 answers

2

GATE2015-1-53
Suppose that the stop-and-wait protocol is used on a link with a bit rate of $64$ $\text{kilobits}$ per second and $20$ $\text{milliseconds}$ propagation delay. Assume that the transmission time for the acknowledgment and the processing time at nodes are negligible. Then the minimum frame size in bytes to achieve a link utilization of at least $50$ $\text{%}$ is_________________.

answered 2 days ago in Computer Networks by Cruzer (19 points) | 8k views

0 votes

1 answer

3

Kurose and Ross Edition 6 Exercise 1 Question R24 (Page No 70)
What is an application-layer message? A transport-layer segment? A network-layer datagram? A link-layer frame?

answered 2 days ago in Computer Networks by Abeer Saxena (11 points) | 29 views

0 votes

1 answer

4

MadeEasy Test Series: Computer Networks - Application Layer Protocols
How to Solve this question ? I am getting answer as 450.

answered 3 days ago in Computer Networks by Deepalitrapti Junior (803 points) | 189 views

0 votes

2 answers

5

Kurose and Ross Edition 6 Exercise 1 Question R25 (Page No 70)
Which layers in the Internet protocol stack does a router process? Which layers does a link-layer switch process? Which layers do a host process?

answered 3 days ago in Computer Networks by Shivangi_05 (11 points) | 75 views

0 votes

2 answers

6

UGCNET-dec2004-26
Error control is needed at the transport layer because of potential error occurring .............. (A) from transmission line noise (B) in router (C) from out of sequence delivery (D) from packet losses

answered 4 days ago in Computer Networks by Nishi Agarwal (49 points) | 525 views

+1 vote

4 answers

7

CSMA/CD
The network consists of 4 hosts distributed as shown below: Assume this network uses CSMA/CD . And signal travels at $3$ $X$ $10^{5} \text{km/sec}$ If sender sends at $1 \text{Mbps}$. What could be the minimum size of packet? (a).$600$ $\text{bits}$ (b). $400$ $\text{bits}$ (c). $6000$ $\text{bits}$ (d). $1500$ $\text{bits}$

answered Jul 10 in Computer Networks by user2525 (41 points) | 475 views

+1 vote

3 answers

8

broadcast
In L.B.A. , we send message from a host to all host in the same network. if NID=11.0.0.0 then a/c to definition of L.B.A we should write it as 11.255.255.255 but we write 255.255.255.255 , so it means we send message from a host to entire world's network host , which is wrong a/c to definition??????

answered Jul 5 in Computer Networks by shivam001 (163 points) | 583 views

0 votes

1 answer

9

UGCNET-June-2019-II-86

answered Jul 5 in Computer Networks by SuvasishDutta Active (1.2k points) | 26 views

0 votes

1 answer

10

UGCNET-June-2019-II-83

answered Jul 5 in Computer Networks by Aman_Singh (83 points) | 16 views

0 votes

1 answer

11

UGCNET-June-2019-II-85

answered Jul 5 in Computer Networks by Aman_Singh (83 points) | 21 views

+36 votes

8 answers

12

GATE2005-73
In a packet switching network, packets are routed from source to destination along a single path having two intermediate nodes. If the message size is $24$ bytes and each packet contains a header of $3$ bytes, then the optimum packet size is: $4$ $6$ $7$ $9$

answered Jul 5 in Computer Networks by King Suleiman (281 points) | 8.8k views

0 votes

1 answer

13

UGCNET-June-2019-II-81

answered Jul 4 in Computer Networks by Satbir Boss (15.3k points) | 21 views

+1 vote

1 answer

14

slotted aloha
what is the formula for throughput in slotted aloha and when it is max or min

answered Jul 3 in Computer Networks by Akash Kumar Roy Junior (529 points) | 378 views

0 votes

1 answer

15

UGCNET-June-2019-II-87

answered Jul 3 in Computer Networks by Hira Thakur Boss (12.9k points) | 18 views

0 votes

1 answer

16

UGCNET-June-2019-II-89

answered Jul 3 in Computer Networks by Abhisek Tiwari 4 Active (4.7k points) | 13 views

0 votes

1 answer

17

UGCNET-June-2019-II-88

answered Jul 3 in Computer Networks by Abhisek Tiwari 4 Active (4.7k points) | 13 views

0 votes

1 answer

18

UGCNET-June-2019-II-82

answered Jul 3 in Computer Networks by Abhisek Tiwari 4 Active (4.7k points) | 16 views

0 votes

1 answer

19

Peter Linz Edition 5 Exercise 12.4 Question 8 (Page No. 321)
Let $G_1$ and $G_2$ be grammars with $G_1$ regular. Is the problem $L(G_1) = L(G_2)$ decidable when $\text(a)$ $G_2$ is unrestricted, $\text(b)$ when $G_2$ is context-free, $\text(c)$ when $G_2$ is regular$?$

answered Jun 24 in Computer Networks by Sumiran Agrawal (91 points) | 32 views

0 votes

1 answer

20

AppliedCourse MOCK
Consider a TCP connection between two machines (A and B) in an environment with 0% packet loss. Assume the round trip time (RTT) between the two machines is 4 [seconds], and the segment size is 3 [Kbytes]. The bandwidth of the connection is 500 [kbps]. ... close to zero. I.e., TCP packets are continuously, back-to-back, sent out of the sender before the first ack arrives back.)

answered Jun 24 in Computer Networks by Prateekj9521 (25 points) | 31 views

0 votes

1 answer

21

#Gatebook_testseries
Consider the following chain topology: A ---- B ----- C ---- D ---- E A is sending packets to E using a reliable transport protocol. Each link above can transmit one packet per second. There are no queues or other sources of delays ... can deliver them in order to the application. The number of packets in this buffer 35 seconds after the sender starts sending the first packet?

answered Jun 23 in Computer Networks by jinal99 (77 points) | 88 views

+1 vote

1 answer

22

forouzan 5 th edition
A host has the address 581E: 1456:2314:ABCD::1211. If the node identification is 48 bits, find the address of the subnet to which the host is attached.

answered Jun 21 in Computer Networks by Jayan_78 (11 points) | 76 views

0 votes

1 answer

23

Link state routing
True / False ) LSR uses dijkstra algorithm ? ) LSR working is similar to dijkstra algorithm ? ) DVR uses bellman algorithm for finding the shortest distance to other routers/hops?

answered Jun 19 in Computer Networks by raju paul (43 points) | 70 views

0 votes

3 answers

24

UGCNET-dec2009-ii-48
Which technology is sometime referred to as wireless cable ? (A) MMDS (B) ATM (C) LMDS (D) CDMA

answered Jun 15 in Computer Networks by Adnan Ashraf (449 points) | 428 views

0 votes

2 answers

25

UGCNET-Dec2011-II-39
All of the following are examples of real security and privacy risks except Hackers Spam Viruses Identity theft

answered Jun 15 in Computer Networks by Adnan Ashraf (449 points) | 227 views

0 votes

3 answers

26

UGCNET-Dec2012-II-3
The GSM network is divided into the following three major systems: SS, BSS, OSS BSS, BSC, MSC CELL, BSS, OSS SS, CELL, MSC

answered Jun 15 in Computer Networks by Adnan Ashraf (449 points) | 1.4k views

0 votes

3 answers

27

UGCNET-Dec2013-II-43
Which of the following is widely used inside t he telephone system for long-haul data traffic? ISDN ATM Frame Relay ISTN

answered Jun 15 in Computer Networks by Adnan Ashraf (449 points) | 1.1k views

+6 votes

2 answers

28

UGCNET-June2016-II-46
An attacker sits between customer and banker and captures the information from the customer and retransmits to the banker by altering the information . This attack is called as Masquerade attack Replay attack Passive attack Denial of service attack

answered Jun 14 in Computer Networks by Adnan Ashraf (449 points) | 1.3k views

0 votes

2 answers

29

Subnet addresses
A class B network address 130.50.0.0 is submitted as follows. The last 10 bits of the host id are allotted for host number and the remaining 6 bits are reserved for subnet number. How many subnets and number of hosts in each subnet are possible with above scheme ? 62,1022 30,510 14,254 ... 130.50.4.1 and 130.50.16.1 130.50.1.1 and 130.50.4.1 130.50.0.0 and 130.50.3.0 None of these

answered Jun 12 in Computer Networks by rucchuu (23 points) | 131 views

0 votes

0 answers

30

forouzan 4th edition chapter 19
An organization is granted the block 16.0.0.0/8. The administrator wants to create 500 fixed-length subnets.Find the first and last addresses in subnet 500.

asked Jun 10 in Computer Networks by chirudeepnamini (15 points) | 67 views

+1 vote

4 answers

31

GATE2019-28
Consider three machines M, N, and P with IP addresses $100.10.5.2, \: 100.10.5.5$, and $100.10.5.6$ respectively. The subnet mask is set to $255.255.255.252$ for all the three machines. Which one of the following is true? M, N, and P all belong to the same subnet Only M and N belong to the same subnet Only N and P belong to the same subnet M, N, and P belong to three different subnets

answered Jun 10 in Computer Networks by shivam001 (163 points) | 1.9k views

0 votes

0 answers

32

self doubt Stop and wait protocol
Consider a network topology using STOP and WAIT protocol A---------R----------B (here R is STORE and FORWARD ROUTER) Tp=1uS , Tx(data)=1000uS, Tx(ack)=10uS File Size =10000bits, Packet size=1000bits. How long will it take for A to ... then A will Transmit second packet OR here A will send packet toHost B and B will send ack back to A then A will send second packet

asked Jun 9 in Computer Networks by gourav94240 (55 points) | 54 views

0 votes

1 answer

33

Ace Test Series 2019: Computer Networks - Congestion Control

answered Jun 9 in Computer Networks by Ram Swaroop Active (3.5k points) | 47 views

+1 vote

1 answer

34

Ace Test Series: Computer Networks - WiFi

answered Jun 9 in Computer Networks by Ram Swaroop Active (3.5k points) | 104 views

0 votes

1 answer

35

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

answered Jun 9 in Computer Networks by Ram Swaroop Active (3.5k points) | 31 views

0 votes

1 answer

36

ISI-PCB-2015-C1-b
A $64000$-byte message is to be transmitted over a $2$-hop path in a store-and-forward packet-switching network. The network limits packets toa maximum size of $2032$ bytes including a $32$-byte header. The trans-mission lines in the network are error free and have a speed of $50$ ... answer as $1*3*(T_t+T_p) + \;31*T_t$ where $T_t=0.325\; ms$ and $T_p=3.333\; ms$. Please Confirm.

answered Jun 4 in Computer Networks by abhishekmehta4u Boss (34.2k points) | 87 views

0 votes

1 answer

37

#CN What is the channel utilization for the go-back-N protocol with window size of 7 for the problem 3?

answered Jun 3 in Computer Networks by karan25gupta (223 points) | 303 views

+6 votes

3 answers

38

ISRO2017-34
Match with the suitable one: List - 1 List - 2 (A) Multicast group membership 1. Distance vector routing (B) Interior gateway protocol 2. IGMP (C) Exterior gateway protocol 3. OSPF (D) RIP 4. BGP A-2, B-3, C-4, D-1 A-2, B-4, C-3, D-1 A-3, B-4, C-1, D-2 A-3, B-1, C-4, D-2

answered Jun 2 in Computer Networks by Ram Swaroop Active (3.5k points) | 2.4k views

0 votes

0 answers

39

Self Doubt:TDM and Polling
Is Time division multiplexing and Polling in syllabus? In the official website they have mentioned only ethernet..

asked May 30 in Computer Networks by Hirak Active (3.3k points) | 48 views

0 votes

0 answers

40

GeeksForGeeks IP addressing ...
Which of the following is a public IP? 10.15.14.12 192.168.52.62 173.32.1.1 None

asked May 30 in Computer Networks by Hirak Active (3.3k points) | 80 views

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title	title:apple
content	content:apple
exclude	-tag:apple
force match	+apple
views	views:100
score	score:10
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is closed	isclosed:true

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