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WIRESHARK LAB 4
RUTUL LUNAGARIYA
Ping plotter Verification:
Wireshark settings change
Ping result
1.
Select the first ICMP Echo Request message sent by your computer, and
expand the Internet Protocol part of the packet in the packet details window.
What is the IP address of your computer? Ans: ip adress : 10.0.66.166
2.
Within the IP packet header, what is the value in the upper layer protocol field? Ans: ICMP (3)
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3.
How many bytes are in the IP header? How many bytes are in the payload of the IP datagram
? Ans: The payload of the datagram will be header length – total length i.e 20-56 = 36 is the pay load of ip datagram
4.
Has this IP datagram been fragmented? Explain how you determined whether
or not the datagram has been fragmented. Ans: no there are no datagram fragmented. Fragment offset = 0
5.
Which fields in the IP datagram always change from one datagram to the next
within this series of ICMP messages sent by your computer? Ans: identification, time to live and header checksum always change
6.
Which fields stay constant? Which of the fields must stay constant? Which fields must change? Why? Ans: IPdatagrams ,version , header length, source IP, destination IP,
differentiated Services, upper Layer Protocol.
7.
Describe the pattern you see in the values in the Identification field of the IP
datagram
Ans: The IP header Identification fields increase with each ICMP Echo (ping) request. Reply keeps increasing
8.
What is the value in the Identification field and the TTL field? Ans: identification : 31229
TTL : 3
9.
Do these values remain unchanged for all of the ICMP TTL-exceeded replies sent to your computer by the nearest (first hop) router? Why? Ans: TTL field remains unchanged because the TTL for the first hop router is always the same (3) the indentification will always change because of conflicting IP datagrams
10. Find the first ICMP Echo Request message that was sent by your computer after you changed the Packet Size in pingplotter to be 2000. Has that message been fragmented across more than one IP datagram? Ans: The packet has been fragmented in all the Ip datagrams as we are increasing
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the packet size. Ideally the packet size is 128.
11.Print out the first fragment of the fragmented IP datagram. What information in the IP header indicates that the datagram been fragmented? What information in the IP header indicates whether this is the first fragment versus
a latter fragment? How long is this IP datagram? Ans:
Fragment offset is 0 so this is the first fragmented packet,the first datagram has a total length of 56, including the header
12.Print out the second fragment of the fragmented IP datagram. What information in the IP header indicates that this is not the first datagram fragment? Are the more fragments? How can you tell?
I can tell that this is not the first fragment, because the fragment offset is 50. this is most likely last fragment
13.What fields change in the IP header between the first and second fragment? Ans: Total length, flags, fragment offset, and checksum.
14.How many fragments were created from the original datagram? Ans: 4 packets created.
15.What fields change in the IP header among the fragments? Ans: fragment offset, and checksum.
Related Questions
Modify the Laser Circuit FSM to output x for 25 ns, assuming Tclk = 5 ns. Draw the new State Diagram. How many states have the new State Diagram?
Write VHDL code showing separate “blocks” for the next state decoder, memory, and output decoder. Add an Asynchronous Reset active Low.
arrow_forward
Given that the base address is FoH.
1. Create a new asm project “Lab2_Q1.asm". Assume that port A of 8255A PPI is
connected to 8085. Write assembly code to send the value of FFH to FoH. Enter a delay
of 2 ms for each transmission.
arrow_forward
Q4. Consider the QPSK digital modulation scheme
(a) What does the abbreviation QPSK stand for?
(b) Sketch an I-Q constellation diagram for this modulation scheme.
(c) State the number of bits per symbol.
(d) If the bit rate that is achieved with this modulation scheme is 128 Mbit s-, what is the
baud (symbol) rate?
arrow_forward
4. What parameter of a PPM signal varies in direct proportion to
the message signal amplitude?
a. the average frequency of the PPM pulses
b. the distance between the PPM pulses
c. the amplitude of the PPM pulses
d. the width of the PPM pulses
5. What is the function of the prefilter in a PTM modulation circuit?
completely removes frequencies greater than 8 kHz
a. completely removes the PTM signal's first replica
b. frequencies
c. filters the message signal
d. partially reconstructs and amplifies the message signal
6. What advantage does a PPM signal have over a PWM signal?
a. can be used for message signals greater than 5 kHz
b. requires lower sampling frequency
c. easier to demodulate
d. requires less transmission power
7. Why does PTM require a higher sampling frequency than PAM?
a. The amplitude of PTM signals is constant.
b. There are more sidebands in the first replica of a PTM
c. Signal than in a PAM signal.
d. A sample/hold circuit requires a higher sampling frequency.
e. There…
arrow_forward
Need a solufor number 2
arrow_forward
Q4. Consider the 16-QAM digital modulation scheme
(a) What does the abbreviation QAM stand for?
(b) Sketch an I-Q constellation diagram for this modulation scheme.
(c) State the number of bits per symbol.
(d) If the bit rate that is achieved with this modulation scheme is 256 Mbit s, what is the
baud (symbol) rate?
arrow_forward
Q6: Sectoring is a way to do what?
a. Achieve branch circuits.
b. Put each phone call in a different time slot.
c. Do SS7 look-ahead call placement.
d. Partition Voice mail boxes
e. It is an ISDN-PRI way of brining in trunks
f. Achieve frequency reuse.
g. None of the above
arrow_forward
The "bubbles" at the outputs of the 7442 decoder mean this IC has active _____ (HIGH, LOW) outputs.
arrow_forward
Q3. b) Suppose you want to transmit the 10-bit message [101101101] by Pulse code
Modulation (PCM). Using clearly labeled diagrams, show the encoding the bit
sequence using the following PCM waveform types:
i) Bipolar RZ Signal
ii) RZ-AMI
iii) Bi – o - L
iv) Delay modulation
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Related Questions
- Modify the Laser Circuit FSM to output x for 25 ns, assuming Tclk = 5 ns. Draw the new State Diagram. How many states have the new State Diagram? Write VHDL code showing separate “blocks” for the next state decoder, memory, and output decoder. Add an Asynchronous Reset active Low.arrow_forwardGiven that the base address is FoH. 1. Create a new asm project “Lab2_Q1.asm". Assume that port A of 8255A PPI is connected to 8085. Write assembly code to send the value of FFH to FoH. Enter a delay of 2 ms for each transmission.arrow_forwardQ4. Consider the QPSK digital modulation scheme (a) What does the abbreviation QPSK stand for? (b) Sketch an I-Q constellation diagram for this modulation scheme. (c) State the number of bits per symbol. (d) If the bit rate that is achieved with this modulation scheme is 128 Mbit s-, what is the baud (symbol) rate?arrow_forward
- 4. What parameter of a PPM signal varies in direct proportion to the message signal amplitude? a. the average frequency of the PPM pulses b. the distance between the PPM pulses c. the amplitude of the PPM pulses d. the width of the PPM pulses 5. What is the function of the prefilter in a PTM modulation circuit? completely removes frequencies greater than 8 kHz a. completely removes the PTM signal's first replica b. frequencies c. filters the message signal d. partially reconstructs and amplifies the message signal 6. What advantage does a PPM signal have over a PWM signal? a. can be used for message signals greater than 5 kHz b. requires lower sampling frequency c. easier to demodulate d. requires less transmission power 7. Why does PTM require a higher sampling frequency than PAM? a. The amplitude of PTM signals is constant. b. There are more sidebands in the first replica of a PTM c. Signal than in a PAM signal. d. A sample/hold circuit requires a higher sampling frequency. e. There…arrow_forwardNeed a solufor number 2arrow_forwardQ4. Consider the 16-QAM digital modulation scheme (a) What does the abbreviation QAM stand for? (b) Sketch an I-Q constellation diagram for this modulation scheme. (c) State the number of bits per symbol. (d) If the bit rate that is achieved with this modulation scheme is 256 Mbit s, what is the baud (symbol) rate?arrow_forward
- Q6: Sectoring is a way to do what? a. Achieve branch circuits. b. Put each phone call in a different time slot. c. Do SS7 look-ahead call placement. d. Partition Voice mail boxes e. It is an ISDN-PRI way of brining in trunks f. Achieve frequency reuse. g. None of the abovearrow_forwardThe "bubbles" at the outputs of the 7442 decoder mean this IC has active _____ (HIGH, LOW) outputs.arrow_forwardQ3. b) Suppose you want to transmit the 10-bit message [101101101] by Pulse code Modulation (PCM). Using clearly labeled diagrams, show the encoding the bit sequence using the following PCM waveform types: i) Bipolar RZ Signal ii) RZ-AMI iii) Bi – o - L iv) Delay modulationarrow_forward
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Recommended textbooks for you
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning