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Recent questions tagged ip-packet

2 votes

1 answer

31

Computer Network | Optimum Packet Size
I think my answer is right ...Please Explain

rahulsangwn asked in Computer Networks Oct 28, 2017

1.8k views

0 votes

1 answer

32

Option field when IP packet has minimum size of 20 bytes?
When the IP packet has minimum size (20bytes), what happens to option field. Is it not present or present with all bits set to 0 (all 40bytes of 0's)?

Mayank Joshi asked in Computer Networks Sep 6, 2017

by Mayank Joshi

771 views

0 votes

3 answers

33

While TCP is a connection oriented service then why its segment follows different path.
I am reading Forouzan in that I have stuck here, I know that. TCP is connection oriented service, means it all segments follow same path, and segments are in order delivered. But it says that TCP ... . How it is happening. Consider this screen shot of Forouzan:- Please explain the proper reason behind it.

Shubhanshu asked in Computer Networks Aug 23, 2017

2.2k views

0 votes

1 answer

34

Computer network MSS and MTU
Are these definations of MSS and MTU correct?? MSS is maximum payload of TCP segment. TCP segment (MSS + TCP header) For IPpacket, it consists of (MSS + TCP header + IP header) And payload of IP packet means (TCPheader + MSS) Ethernet frame ... Also is fragmentation always done at router?? Can it be done by source?? I am really confused about these terms. Plz verify.

Rahul Jain25 asked in Computer Networks Feb 8, 2017

by Rahul Jain25

2.9k views

8 votes

5 answers

35

GateBook Mock-Test-2
Suppose datagrams are limited to 1,500 bytes (including header) between source Host A and destination Host B. Assuming a 20-byte IP header and a 20-byte TCP header, how many datagrams would be required to send an MP3 consisting of 4 million bytes?

smartmeet asked in Computer Networks Feb 7, 2017

7.5k views

3 votes

3 answers

36

Packet Switched Network [GateBook]

biranchi asked in Computer Networks Jan 24, 2017

1.1k views

3 votes

1 answer

37

Which device have Exactly one i/p address? (Work Station,Router,Gateway can have more than one i/p)

smartmeet asked in Computer Networks Jan 14, 2017

1.4k views

4 votes

1 answer

38

UGC NET CSE | June 2014 | Part 3 | Question: 69
Which of the following is used in the options field of $IPv4$? Strict source routing Loose source routing Time stamp All of the above

makhdoom ghaya asked in Computer Networks Jul 12, 2016

by makhdoom ghaya

3.3k views

0 votes

3 answers

39

UGC NET CSE | December 2012 | Part 2 | Question: 9
If a packet arrive with M-bit value is ‘1’ and a fragmentation offset value ‘0’, then it is ____ fragement. First Middle Last All of the above

go_editor asked in Computer Networks Jul 8, 2016

7.4k views

11 votes

5 answers

40

ISRO2014-55
An IP packet has arrived with the first $8$ bits as $0100 0010.$ Which of the following is correct? The number of hops this packet can travel is $2$ The total number of bytes in header is $16$ bytes The upper layer protocol is ICMP The receiver rejects the packet

shivanisrivarshini asked in Computer Networks Jun 27, 2016

by shivanisrivarshini

7.1k views

4 votes

4 answers

41

ISRO2009-74
Use of IPSEC in tunnel mode results in IP packet with same header IP packet with new header IP packet without header No changes in IP packet

Anuanu asked in Computer Networks May 30, 2016

by Anuanu

3.3k views

32 votes

6 answers

42

GATE CSE 2016 Set 1 | Question: 53
An IP datagram of size $1000$ $\text{bytes }$arrives at a router. The router has to forward this packet on a link whose MTU (maximum transmission unit) is $100$ $\text{bytes }$. Assume that the size of the IP header is $20$ $\text{bytes }.$ The number of fragments that the IP datagram will be divided into for transmission is________.

Sandeep Singh asked in Computer Networks Feb 12, 2016

by Sandeep Singh

16.6k views

3 votes

2 answers

43

Steps taken by a Router on receiving a packet.
A Router outside the organization received a packet 224.240.7.91. Consider following steps that a router may take: 1. The router looks in its routing table to find out how to route the packet to the destination 2. The router looks at ... . So the router should take only step 1. Am I missing something? What should be the correct answer to this question?

अनुराग पाण्डेय asked in Computer Networks Dec 5, 2015

by अनुराग पाण्डेय

1.1k views

7 votes

4 answers

44

ISRO2014-31
A IP packet has arrived in which the fragmentation offset value is $100,$ the value of $\textsf{HLEN}$ is $5$ and the value of total length field is $200.$ What is the number of the last byte? $194$ $394$ $979$ $1179$

ajit asked in Computer Networks Sep 23, 2015

by ajit

9.6k views

76 votes

9 answers

45

GATE CSE 2015 Set 2 | Question: 52
$\text{Host A}$ sends a $\text{UDP}$ datagram containing $8880\text{ bytes}$ of user data to $\text{host B}$ over an $\text{Ethernet LAN}.$ Ethernet frames may carry data up to $1500\text{ bytes (i.e. MTU = 1500 bytes)}.$ Size of $\text{UDP}$ ... be the contents of offset field in the last fragment? $6$ and $925$ $6$ and $7400$ $7$ and $1110$ $7$ and $8880$

go_editor asked in Computer Networks Feb 13, 2015

25.6k views

35 votes

7 answers

46

GATE CSE 2015 Set 1 | Question: 22
Which of the following fields of an IP header is NOT modified by a typical IP router? Check sum Source address Time to Live (TTL) Length

makhdoom ghaya asked in Computer Networks Feb 13, 2015

by makhdoom ghaya

10.1k views

24 votes

6 answers

47

GATE IT 2004 | Question: 86
In the TCP/IP protocol suite, which one of the following is NOT part of the IP header? Fragment Offset Source IP address Destination IP address Destination port number

Ishrat Jahan asked in Computer Networks Nov 2, 2014

by Ishrat Jahan

6.2k views

20 votes

6 answers

48

GATE CSE 2010 | Question: 15. PGEE 2018
One of the header fields in an IP datagram is the Time-to-Live (TTL) field. Which of the following statements best explains the need for this field? It can be used to prioritize packets. It can be used to reduce delays. It can be used to optimize throughput. It can be used to prevent packet looping.

go_editor asked in Computer Networks Sep 29, 2014

9.7k views

48 votes

10 answers

49

GATE CSE 2014 Set 3 | Question: 28
An $IP$ router with a $\text{Maximum Transmission Unit (MTU)}$ of $1500$ bytes has received an $IP$ packet of size $4404\text{ bytes}$ with an $IP$ header of length $20\text{ bytes}$. The values of the relevant fields in the header of the third $IP$ ... $1,$ Datagram Length$: 1500;$ Offset$: 370$ $\text{MF bit}$: $0,$ Datagram Length$: 1424;$ Offset$: 2960$

go_editor asked in Computer Networks Sep 28, 2014

21.2k views

46 votes

9 answers

50

GATE CSE 2014 Set 3 | Question: 25
Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram ... $\text{ii}$ only $\text{ii}$ and $\text{iii}$ only $\text{i, ii}$ and $\text{iii}$

go_editor asked in Computer Networks Sep 28, 2014

16.3k views

26 votes

4 answers

51

GATE CSE 2006 | Question: 5
For which one of the following reasons does internet protocol(IP) use the time-to-live(TTL) field in IP datagram header? Ensure packets reach destination within that time Discard packets that reach later than that time Prevent packets from looping indefinitely Limit the time for which a packet gets queued in intermediate routers

Rucha Shelke asked in Computer Networks Sep 16, 2014

by Rucha Shelke

11.3k views

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Recent questions tagged ip-packet