using python to access web data week 3 assignment

Networks and Sockets (Chapter 12)

1. What do we call it when a browser uses the HTTP protocol to load a file or page from a server and display it in the browser?

  • Internet Protocol (IP)
  • IMAP
  • SMTP
  • The Request/Response Cycle

2. Which of the following is most similar to a TCP port number?

  • A telephone number
  • A street number in an address
  • The GPS coordinates of a building
  • A telephone extension
  • The distance between two locations

3. What must you do in Python before opening a socket?

  • import tcp-socket
  • import tcp
  • open socket
  • _socket = true
  • import socket

4. Which of the following TCP sockets is most commonly used for the web protocol (HTTP)?

  • 80
  • 119
  • 23
  • 22
  • 25

5. Which of the following is most like an open socket in an application?

  • An “in-progress” phone conversation
  • Fiber optic cables
  • The wheels on an automobile
  • The chain on a bicycle
  • The ringer on a telephone

6. What does the "H" of HTTP stand for?

  • Hyperspeed
  • Simple
  • wHolsitic
  • Manual
  • HyperText

7. What is an important aspect of an Application Layer protocol like HTTP?

  • How long do we wait before packets are retransmitted?
  • How much memory does the server need to serve requests?
  • Which application talks first? The client or server?
  • What is the IP address for a domain like

8. What are the three parts of this URL (Uniform Resource Locator)?

  • Protocol, host, and document
  • Document, page, and protocol
  • Page, offset, and count
  • Host, offset, and page
  • Protocol, document, and offset

9. When you click on an anchor tag in a web page like below, what HTTP request is sent to the server?

<p>Please click <a href=”page1.htm”>here</a>.</p>
  • GET
  • POST
  • PUT
  • INFO

10. Which organization publishes Internet Protocol Standards?

  • IETF
  • LDAP
  • IMS
  • SIFA

Understanding the Request / Response Cycle

Exploring the HyperText Transport Protocol You are to retrieve the following document using the HTTP protocol in a way that you can examine the HTTP Response headers. There are three ways that you might retrieve this web page and look at the response headers: Preferred: Modify the program to retrieve the above URL and print out the headers and data. Make sure to change the code to retrieve the above URL - the values are different for each URL. Open the URL in a web browser with a developer console or FireBug and manually examine the headers that are returned. Enter the header values in each of the fields below and press "Submit". Last-Modified: ETag: Content-Length: Cache-Control: Content-Type:

import socket

mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mysock.connect((‘’, 80))
cmd = ‘GET HTTP/1.0\r\n\r\n’.encode()

while True:
data = mysock.recv(512)
if len(data) < 1:
print(data.decode(), end=”)


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