EBK COMPUTER NETWORKING
7th Edition
ISBN: 8220102955479
Author: Ross
Publisher: PEARSON
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Chapter 9, Problem P4P
a)
Program Plan Intro
HTTP streaming:
- The video files are being stored at HTTP server in the form of ordinary file with URL that is specific to the video.
- The user can watch the videos by establishing a TCP connection with the server.
- The client issues the HTTP GET request for the requested URL.
- The server will in turn send the video file through the HTTP response in quick manner.
- The video requested are delivered as quickly as possible when the congestion control and flow control allows.
b)
Program Plan Intro
HTTP streaming:
- The video files are being stored at HTTP server in the form of ordinary file with URL that is specific to the video.
- The user can watch the videos by establishing a TCP connection with the server.
- The client issues the HTTP GET request for the requested URL.
- The server will in turn send the video file through the HTTP response in quick manner.
- The video requested are delivered as quickly as possible when the congestion control and flow control allows.
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Students have asked these similar questions
6. Consider sending over HTTP a Web page that consists of one video clip, and five images.
Suppose that the video clip is transported as 25 frames, and each image has 4 frames.
a. If all the video frames are sent first without interleaving, how many "frame times"
are needed until all five images are sent?
b. If frames are interleaved, how many frame times are needed until all five images
are sent.
Suppose that the average object size is 850,000 bits and that the average request rate from the institution’s browsers to the origin servers is 16 requests per second. Also suppose that the amount of time it takes from when the router on the Internet side of the access link forwards an HTTP request until it receives the response is three seconds on average (see Section 2.2.5). Model the total average response time as the sum of the average access delay (that is, the delay from Internet router to institution router) and the average Internet delay. For the average access delay, use Δ/(1 – Δ ), where Δ is the average time required to send an object over the access link and is the arrival rate of objects to the access link.
a. Find the total average response time.b. Now suppose a cache installed in the institutional LAN, Suppose the miss rate is 0.4. Find the total response time.
(a) Suppose a server S and client C are connected over the Internet. The one-way prop-
agation delay from S to C is 50 ms. The maximum throughput between S and C is
R = 200 Mbps. A browser on client C makes an HTTP request for a webpage on server
S. The base HTML file is of size 500 KB and it references five objects, each of size
5 MB. Find the total response time for the client to receive the entire webpage using
nonpersistent HTTP with up to two parallel connections. Assume that when two par-
allel connections are active, the throughput for each connection is 40% of the maximum
throughput R.
(b) Suppose an application running on host ece.gmu.edu needs to resolve the domain name
cs.vtech.edu. Draw a diagram (with labels) showing the sequence of queries/responses
in a recursive DNS query to find the answer in a scenario where all levels of the DNS
hierarchy are involved.
Chapter 9 Solutions
EBK COMPUTER NETWORKING
Ch. 9 - Prob. R1RQCh. 9 - Prob. R2RQCh. 9 - Prob. R3RQCh. 9 - Prob. R4RQCh. 9 - Prob. R5RQCh. 9 - Prob. R6RQCh. 9 - Prob. R7RQCh. 9 - Prob. R8RQCh. 9 - Prob. R9RQCh. 9 - Prob. R10RQ
Ch. 9 - Prob. R11RQCh. 9 - Prob. R12RQCh. 9 - Prob. R13RQCh. 9 - Prob. P1PCh. 9 - Prob. P2PCh. 9 - Prob. P3PCh. 9 - Prob. P4PCh. 9 - Prob. P5PCh. 9 - Prob. P6PCh. 9 - Prob. P7PCh. 9 - Prob. P8PCh. 9 - Prob. P9PCh. 9 - Prob. P10PCh. 9 - Prob. P11PCh. 9 - Prob. P12PCh. 9 - Prob. P13PCh. 9 - Prob. P14PCh. 9 - Prob. P15PCh. 9 - Prob. P16PCh. 9 - Prob. P17PCh. 9 - Prob. P18PCh. 9 - Prob. P19PCh. 9 - Prob. P20PCh. 9 - Prob. P21PCh. 9 - Prob. P22P
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