Start the “TCP/IP” (reliable connection simulator) applet. In the text

 

  1. Start the “TCP/IP” (reliable connection simulator) applet.
  2. In the text field labeled “Your message:”, type the following: “Computer networking is essential in our world today.“. Then press the button “Send a message.”
  3. Watch the entire sequence of packets that are sent for the sample message. How many “DAT” packets were sent? How many “ACK” packets were sent?
  4. If each character or blank in a packet header counts for one character, and all “DAT” packets except the last carry 10 characters (including the blanks), and “ACK” packets have no data characters (though they do have a header), count up how many characters were sent in total.
  5. There are 52 characters in the above message, including blanks and punctuation. Subtract 52 from the total number of characters sent in both directions in all packets. Divide this number by the total number of characters to get the overhead (those characters which are not really data but yet you have to transmit them), represented as a percentage.
  6. Imagine that you have a million-character message to send, perhaps a large file. How many characters in total (and to your best estimate) would be sent in all packets necessary to move it from node 0 to node 1?
  7. What would be an obvious way to decrease the overhead?
  8. Repeat Steps 1 and 2.
  9. Select “Delete packets that are touched“.
  10. Delete some data packets by clicking on them as they move along the wire and watch the retransmission after timeout.
  11. What happens if you delete the re-transmitted packet?
  12. Now try deleting some ACK or NAK packets. What happens?
  13. See if you can compute the checksum as TCP/IP does. Run the applet, using any message. Select a data packet, but don’t select the last packet because it might be too short, less than 10 characters. Count up the characters, including blanks. If they do not equal 10, assume there are blanks at the end so that the character count is 10.
  14. Using the “Text Encoding in ASCII” applet, type in the characters from the data packet, and click on “translate text“.
  15. Add up the values for each of the characters. Then calculate the modulus of this number using 256.
  16. Compare your manually computed checksum for the first packet of the message “Introduction to Computer Science” against what the applet shows for the packet. Do they match?
  17. Now damage your packet by altering one character. Re-compute the checksum. You should realize how the applet can spot errors.
  18. Think of a way that a packet can be damaged and still have the same checksum as the undamaged version. Give one example for this scenario.

Share This Post

Email
WhatsApp
Facebook
Twitter
LinkedIn
Pinterest
Reddit

Order a Similar Paper and get 15% Discount on your First Order

Related Questions

Early Childhood and Special Education birth to grade 2

his is for my field experience and practicum class…ABOUT Early Childhood and Special Education birth to grade 2…I will present the lesson( as my exam)you will write for the 2-3 year old kids, group of 10 kids, and lesson will take 30 min. First I’ll give kids stickers, they will

Review media segment in which three early childhood professionals discuss

Review media segment in which three early childhood  professionals discuss their thoughts and experiences in working with  children and their families who are immigrants. Which comments and  insights from the media segment resonated with you the most? Bring to mind the course text reading and the ideas shared  throughout Chapter

Discuss a biography from a christian perspective of George W Bush

Write an excelent biography from a christian perspective of George W Bush- with absolutly no plagiarism nor grammatical errors -for christian liberty high school. The paper needs to be no less than 4 pages, 1500 words, double spaced, with at least four sources including two hard copy books, periodicals or

Overview: In this write-up, you will write an article minimum

Overview: In this write-up, you will write an article minimum of 2 pages addressing global intervention according to the prompt below.  Instructions: Expand on an example of a global intervention (ex. vaccination process, environmental process, etc.) Measure the cost-benefit of the process utilizing the principles of social justice and/or health

Read the following excerpt from a talk by the famous

Premium Paper Help is a professional writing service that provides original papers. Our products include academic papers of varying complexity and other personalized services, along with research materials for assistance purposes only. All the materials from our website should be used with proper references.

CSU AHIMA Standards of Ethical Coding Discussion Nursing Assignment Help

Access and review the AHIMA standards of ethical coding. Using the attached rubric develop a well-thought-out original response by identifying two of the ethical coding standards and provide one ethical issue that might occur if one of the two standards you selected is not adhered to in a healthcare facility.

250 words. Review the “Lonely Employees” Case Incident 2 on

250 words.   Review the “Lonely Employees” Case Incident 2 on page 660 and respond with answers to the questions using your critical thinking and moral reasoning skills. Case Incident 2: Lonely Employees “Teachers don’t have a chance to talk to each other very much … it is an amazingly

1.2 Issues with evidence that was collected at crime scenes

1.2  Issues with evidence that was collected at crime scenes can occur during trial if consent forms or search warrants were not completed during the investigation. Additionally, if there are problems with expert witness testimony the judge can prevent the witness from testifying. Discuss one of the following and how

Submit a small write up about the project you want

Submit a small write up about the project you want to complete for this course. Think of this as an abstract for your project. Once you submit your idea I will evaluate them and ask you complete the project or part of the project that is feasible within this semester.

TOPIC: In alert and oriented adult patients on a medical

  TOPIC:   In alert and oriented adult patients on a medical surgical unit, does engagement of patients using a scripted tool during bedside handoff at each shift change compared to no patient engagement in nursing handoff increase HCAHPS scores and positive patient feedback in leadership rounding after a three-month

Diverging reactions to the discontent or political protests during the

Diverging reactions to the discontent or political protests during the Arab Spring in comparison of Tunisia and Jordan with regard to protesters, their demands and outcomes of revolutions . The essay must contain introduction (circa 600 words) , literature review on general topic of protest movements, leaderless movements, mass mobilization, democratization

enry, a 58 y/o male, recently reports waking up in

enry, a 58 y/o male, recently reports waking up in the middle of the night with burning abdominal pain. Symptoms occur several nights a week with occasional discomfort in the middle of the afternoon. A bland diet or drinking milk do seem to help and spicy foods aggregate the symptoms.

Watch the following Presidential Debate on YouTube and wri/te two

Watch the following Presidential Debate on YouTube and wri/te two paragr/aph critiques for each candidate about any of the debates, you don’t have to wri/te a critique for all the debates just use two of them.  I will provide an example of how I wanted to be structured. ADHERE TO

– In a single Word document, complete Chapter 12 Case

– In a single Word document, complete Chapter 12 Case Problem: “Investment Strategy.” If using Excel or Minitab for your calculations, charts, and graphs, please copy and paste your work into the Word document.  Do not attach Excel or Minitab as separate documents.   -response should be a minimum of   2-3

Instructions In this course, you will be creating templates each

Instructions In this course, you will be creating templates each week that will celebrate your growing awareness of cultural diversity.  The template is a collection of images, videos, and reflections all centered on the weekly theme found in your unit Learning Content.  The template is divided into portions representing different

Consider examples of research questions below: Does the organization of

Consider examples of research questions below: Does the organization of renal transplant nurse coordinators’ responsibilities influence live donor rates? How, if at all, are the timing and location of suicide prevention appointments linked to veterans’ suicide rates?”Examples of Research Questions | PhD | School of Nursing | Vanderbilt University,” n.d.) Reference Examples of Research Questions |