2_2 is RTT +2* time frame= 4+2*1.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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![HTTP/2 versus HTTP/1.1: object download delays.
Consider a client and a server, separated by an RTT of 4 time units. The client makes a request for 4 objects at t=0. O1 consists of 10 frames, 02 and 04 each consist of 1 frame,
and 03 consists of 2 frames. In the HTTP/2 example shown below, the server is transmitting frames to the client in the order 01, 02, 03, 04 (as long as there are frames of type i to
transmit, and when not the server just moves on to a frame from object i+1 mod 4). Each frame takes 1 time unit to transmit.
server
GET O4 GET 03
GET O2 GET 01
object data requested
client
O4
O2
Оз
Under HTTP 1.1 (not shown below), the server would send 01, 02, 03, O4 in that first-come-first-served (FCFS) order, sending each object in its entirety before moving on to send
the next object in that order.
Let's define the object download delay as the time from when an object is requested (at t=0 below) to the time that object is received in its entirety. What is the average object
download delay (the sum of the four object download delays divided by 4) under the HTTP/2 object frame transmission order shown?
Please note that we added an RTT to this version, therefore the time to download O 2 is RTT + 2* time frame= 4+2*1.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb5ac08f7-42c3-4170-80a5-c0dc5b612826%2F9aa8879f-10cc-42f6-8350-091fd6aa4d25%2Fxr3jc8a_processed.png&w=3840&q=75)
Transcribed Image Text:HTTP/2 versus HTTP/1.1: object download delays.
Consider a client and a server, separated by an RTT of 4 time units. The client makes a request for 4 objects at t=0. O1 consists of 10 frames, 02 and 04 each consist of 1 frame,
and 03 consists of 2 frames. In the HTTP/2 example shown below, the server is transmitting frames to the client in the order 01, 02, 03, 04 (as long as there are frames of type i to
transmit, and when not the server just moves on to a frame from object i+1 mod 4). Each frame takes 1 time unit to transmit.
server
GET O4 GET 03
GET O2 GET 01
object data requested
client
O4
O2
Оз
Under HTTP 1.1 (not shown below), the server would send 01, 02, 03, O4 in that first-come-first-served (FCFS) order, sending each object in its entirety before moving on to send
the next object in that order.
Let's define the object download delay as the time from when an object is requested (at t=0 below) to the time that object is received in its entirety. What is the average object
download delay (the sum of the four object download delays divided by 4) under the HTTP/2 object frame transmission order shown?
Please note that we added an RTT to this version, therefore the time to download O 2 is RTT + 2* time frame= 4+2*1.
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