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Recent questions tagged fragmentation

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GO Classes 2023 | IIITH Mock Test 3 | Question: 44
Which of the following statements about datagrams sent by a node in a network using $\textsf{IPv4}$ protocol is (are) true? Datagrams at the source must be the size of the smallest maximum transmission unit (MTU) of all the ... may be fragmented during routing. Datagrams are reassembled only at the destination. I only II only III only II and III

GO Classes asked in Computer Networks Apr 15

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1 vote

1 answer

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DRDO CSE 2022 Paper 2 | Question: 17
$1020$ bytes long packet must be routed through an interface with $\text{MTU}$ of $256$ bytes. Asssuming the smallest possible $\text{IPv4}$ header size, fragmentation will be required for the transmission. For the second fragment created in this ... (in binary), Fragment Offset field (in decimal), and Total Length field (in decimal) of $\text{IPv4}$ header.

admin asked in Computer Networks Dec 15, 2022

by admin

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1 answer

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Fragmentation in Networking
Suppose a 22-byte packet is to be transmitted through a network of MTU = 3byte. The elementary fragment size is 1 byte. Show the segment numbering of the above packet. Packet number is 127.

rayhanrjt asked in Computer Networks Dec 13, 2022

178 views

2 votes

1 answer

4

doubt.
What is the difference between frame & fragmented packet?

Nisha Bharti asked in Computer Networks Sep 30, 2022

by Nisha Bharti

215 views

0 votes

1 answer

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External fragmentation, Fixed partioning
If the main memory is divided into 4 fixed sized partitions of 5KB each and each of them is occupied by processes of 4KB each can I say that the total 4KB of space unused as external fragmentation?

Veer123 asked in Operating System Sep 3, 2022

164 views

0 votes

1 answer

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Test Book Test Full Test 7
A message consisting of $2400$ bits is to be passed over the Internet. The message is passed to the transport layer which appends a $150$ - bit header, followed by the network layer which uses a $120$ - bit header. Network layer packets ... network only accepts up to $900$ bits long. The number of bits, including headers delivered to the destination network, is _________.

Nishisahu asked in Computer Networks Jan 2, 2022

855 views

1 vote

0 answers

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Made-Easy Test Series
Consider source X and destination Z is connected through an intermediate network Y. X sends a message of 260 bytes of application data to Z. TCP layer at source X prefixes 40 byte header to the message and then IP layer attach 40 byte header. Data link ... are correctly delivered. (Consider 40 bytes IP header at each network). a)400 bytes b)384 bytes c)360 bytes d)424 bytes

webron9 asked in Computer Networks Dec 25, 2021

336 views

0 votes

1 answer

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Applied Mock Test
The packet is sent from source to router with the link having the maximum transmission unit (MTU) as 480 bytes, the header is of size 20 bytes. The intermediate fragment size is X and the last fragment size is Y when the packet size is of 2000 bytes including the header. Calculate the value of X+Y in bytes?

LRU asked in Computer Networks Dec 18, 2021

by LRU

400 views

1 vote

1 answer

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Applied Mock Test
Consider an IP packet with a length of 2000 bytes which includes a 20-byte header . The packet is forwarded to an IPv4 router that supports a Maximum Transmission Unit (MTU) of 400 bytes. Assume that the length of the IP header in all the outgoing fragments of this packet is 20 bytes. The fragmentation offset value stored in the third fragment is _______.

LRU asked in Computer Networks Dec 18, 2021

by LRU

380 views

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1 answer

10

Applied Test Series
A router with MTU of 1024 bytes has received an IP packet of size 4240 bytes with an IP header of 20 bytes. The value of MF and offset of the 3rd fragment is ________

LRU asked in Computer Networks Nov 11, 2021

by LRU

509 views

3 votes

1 answer

11

Applied Test Series
Let an IP datagram of the following data and header sizes be sent through a network of MTU 500 bytes. Calculate the fragment offset values that should be set for 3rd fragment ? IP header = 40 bytes TCP header = 60 bytes• Data = 1000 bytes• MTU = 500 bytes•

LRU asked in Computer Networks Oct 10, 2021

by LRU

740 views

1 vote

1 answer

12

Applied Test Series
The packet is sent from source to router with the link having the maximum transmission unit (MTU) as 480 bytes, the header is of size 20 bytes. The intermediate fragment size is X and the last fragment size is Y when the packet size is of 2000 bytes including the header. Calculate the value of X+Y in bytes?

LRU asked in Computer Networks Oct 4, 2021

by LRU

604 views

0 votes

1 answer

13

Applied Test Series
Suppose a router receives an IP packet containing 600 data bytes and has to forward the packet to a network with a maximum transmission unit of 200 bytes. Assume that the IP header is 20 bytes long. What will be the fragment offset of the third fragment ?

LRU asked in Computer Networks Oct 4, 2021

by LRU

360 views

1 vote

1 answer

14

NIELIT Scientific Assistant A 2020 November: 75
The ___________ field in $\textsf{IPv4}$ datagram is not related to fragmentation. Flag Offset TOS Identifier

gatecse asked in Computer Networks Dec 9, 2020

172 views

1 vote

1 answer

15

NIELIT 2017 DEC Scientific Assistant A - Section B: 29
What is Compaction ? a technique for overcoming internal fragmentation a paging technique a technique for overcoming external fragmentation a technique for overcoming fatal error

Lakshman Bhaiya asked in Operating System Mar 31, 2020

by Lakshman Bhaiya

1.2k views

2 votes

1 answer

16

NIELIT 2017 DEC Scientific Assistant A - Section B: 51
The demerits of the fragmentation are : Complex routers Open to DOS attack No overlapping of fragments $\left (A \right)$ and $\left ( B \right)$ both

Lakshman Bhaiya asked in Computer Networks Mar 31, 2020

by Lakshman Bhaiya

561 views

0 votes

0 answers

17

Andrew S. Tanenbaum (OS) Edition 4 Exercise 4 Question 11 (Page No. 333)
Contiguous allocation of files leads to disk fragmentation, as mentioned in the text, because some space in the last disk block will be wasted in files whose length is not an integral number of blocks. Is this internal fragmentation or external fragmentation? Make an analogy with something discussed in the previous chapter.

Lakshman Bhaiya asked in Operating System Oct 26, 2019

by Lakshman Bhaiya

221 views

0 votes

2 answers

18

Andrew S. Tanenbaum (OS) Edition 4 Exercise 3 Question 45 (Page No. 259)
Explain the difference between internal fragmentation and external fragmentation. Which one occurs in paging systems? Which one occurs in systems using pure segmentation?

Lakshman Bhaiya asked in Operating System Oct 26, 2019

by Lakshman Bhaiya

749 views

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Recent questions tagged fragmentation