logo Hurry, Grab up to 30% discount on the entire course
Order Now logo

Ask This Question To Be Solved By Our ExpertsGet A+ Grade Solution Guaranteed

expert
Miguel OrtizEngineering
(4/5)

981 Answers

Hire Me
expert
Jeremiah BennettComputer science
(5/5)

927 Answers

Hire Me
expert
Devanshu KamraMarketing
(5/5)

975 Answers

Hire Me
expert
Annette RodriguezGeneral article writing
(5/5)

728 Answers

Hire Me
Computer Network

which a single router is transmitting packets, each of length L bits, over a single link with transmission rate R Mbps to another router at the other end of the link.

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

Question 1 

Consider the figure below, in which a single router is transmitting packets, each of length L bits, over a single link with transmission rate R Mbps to another router at the other end of the link.

Suppose that the packet length is L= 12000 bits, and that the link transmission rate along the link to router on the right is R = 10 Mbps.

(a) What is the transmission delay (the time needed to transmit all of a packet's bits into the link)? (b) what is the maximum number of packets per second that can be transmitted by the link?

Question 2

 Computing end-end delay (transmission and propagation delay)

Consider the figure below, with three links, each with the specified transmission rate and link length.

Find the end-to-end delay (including the transmission delays and propagation delays on each of the three links, but ignoring queueing delays and processing delays) from when the left host begins transmitting the first bit of a packet to the time when the last bit of that packet is received at the server at the right. The speed of light propagation delay on each link is 3x10**8 m/sec. Note that the transmission rates are in Mbps and the link distances are in Km. Assume a packet length of 16000 bits. Give your answer in milliseconds.

Question 3

 End to End Throughput and Bottleneck Links

Consider the scenario shown below, with four different servers connected to four different clients over four three-hop paths. The four pairs share a common middle hop with a transmission capacity of R = 100 Mbps. The four links from the servers to the shared link have a transmission capacity of RS = 90 Mbps. Each of the four links from the shared middle link to a client has a transmission capacity of RC = 60 Mbps per second. You might want to review Figure 1.20 in the text before answering the following questions:

  1. What is the maximum achievable end-end throughput (in Mbps) for each of four client-to-server pairs, assuming that the middle link is fair-shared (i.e., divides its transmission rate equally among the four pairs)?

  2. Which link is the bottleneck link for each session?

  3. Assuming that the senders are sending at the maximum rate possible, what are the link utilizations for the sender links (RS), client links (RC), and the middle link (R)?

Question 4

 The HTTP RESPONSE message

 Consider the figure below, where the server is sending a HTTP RESPONSE message back the client.

Suppose the server-to-client HTTP RESPONSE message is the following:

 

HTTP/1.1 200 OK

Date: Mon, 27 May 2019 19:12:59 +0000

Server: Apache/2.2.3 (CentOS)

Last-Modified: Mon, 27 May 2019 19:13:59 +0000 ETag:17dc6-a5c-bf716880.

Content-Length: 4264

Keep-Alive: timeout=22, max=54 Connection: Keep-alive Content-type: text/html

Answer the following questions:

 

  • Is the response message using HTTP 1.0 or HTTP 1.1?

  • Was the server able to send the document successfully? Explain

  • At what date and time was this response sent?

  • When was the file last modified on the server?

  • How many bytes are there in the document being returned by the server?

  • What is the default mode of connection for HTTP protocol? Is the connection in the reply persistent or nonpersistent?

  • What is the type of file being sent by the server in response?

  • Does the response message use separate keep-alive messages?

  • What is the name of the server and its version ? List the advantages of the server

  • What is the timeout value for the response message?

 

The advanced questions below may require you to dig into the HTTP specification [RFC 7231] or other online documents:

 

  • Give the default connection timeout for the given

  • Should the timeout value be short or long? Give reasons for your choice of

  • Is the connection dropped or kept open after the timeout? Can the connection be extended even after timeout? Explain

  • What are the maximum number of requests and responses the server has allowed? What happens when the maximum number of requests and responses are sent?

  • What is the ETag in the success response message sent? State its

  • Will the ETag change if the resource content at this particular resource location changes?

Related Questions

. The fundamental operations of create, read, update, and delete (CRUD) in either Python or Java

CS 340 Milestone One Guidelines and Rubric  Overview: For this assignment, you will implement the fundamental operations of create, read, update,

. Develop a program to emulate a purchase transaction at a retail store. This  program will have two classes, a LineItem class and a Transaction class

Retail Transaction Programming Project  Project Requirements:  Develop a program to emulate a purchase transaction at a retail store. This

. The following program contains five errors. Identify the errors and fix them

7COM1028   Secure Systems Programming   Referral Coursework: Secure

. Accepts the following from a user: Item Name Item Quantity Item Price Allows the user to create a file to store the sales receipt contents

Create a GUI program that:Accepts the following from a user:Item NameItem QuantityItem PriceAllows the user to create a file to store the sales receip

. The final project will encompass developing a web service using a software stack and implementing an industry-standard interface. Regardless of whether you choose to pursue application development goals as a pure developer or as a software engineer

CS 340 Final Project Guidelines and Rubric  Overview The final project will encompass developing a web service using a software stack and impleme