Computer Systems: A Programmer's Perspective Plus Mastering Engineering With Pearson Etext -- Access Card Package (3rd Edition)
Computer Systems: A Programmer's Perspective Plus Mastering Engineering With Pearson Etext -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780134123837
Author: Randal E. Bryant, David R. O'Hallaron
Publisher: PEARSON
bartleby

Concept explainers

Question
Book Icon
Chapter 11.5, Problem 11.5PP
Program Plan Intro

IP addresses:

  • The IP address denotes an unsigned integer that is 32-bit.
  • The IP addresses is been stored by network programs in IP address structure.
  • The addresses present in IP address structure are stored in network byte order.
  •  An unsigned 32-bit integer is converted from host byte order to network byte order by “htonl” function.
  • An unsigned 32-bit integer is converted from network byte order host byte order by “ntohl” function.
  • The IP address is presented to humans in a form known as “dotted-decimal” notation.
    • Each byte is been represented by its corresponding decimal value and is separated by a period from other bytes.

Passing program arguments to server:

  • The arguments for “GET” requests are passed in the URI.
  • The character “?” separates filename from the arguments.
  • The character “&” separates each argument.
  • The arguments do not allow spaces in it.

Server passes arguments to child:

  • The server calls “fork” to create a child process and calls “execve” to run program in child’s context once it receives a request.
  • The child process sets CGI environment variable values.
  • The “adder” program can reference it at run time using “getenv” function of linux.

Output is sent by child:

  • The dynamic content of a CGI program is to be sent to standard output.
  • A CGI program sends dynamic content to standard output.
  • It uses “dup2” function for redirecting standard output to connected descriptor associated with client.
  • The result written to standard output by CGI program, it goes directly to client.

Blurred answer
Students have asked these similar questions
Can you help me with this problem
Given the following addresses, which two addresses conflict in the cache: The numb of locations in the cache is 2048, the cahche is indexed by address bits 15 to 5 and the tag bits are from 31 to 16.  (a) 0x0000 0100 (b) 0x0000 1400 (c) 0x0010 0100 (d) 0x0100 0140
5. RetailItem ClassWrite a class named RetailItem that holds data about an item in a retail store. The class should store the following data in attributes: item description, units in inventory, and price. Once you have written the class, write a program that creates three RetailItem objects and stores the following data in them: Description    Units in Inventory    PriceItem #1    Jacket    12    59.95Item #2    Designer Jeans    40    34.95Item #3    Shirt    20    24.95
Knowledge Booster
Background pattern image
Computer Science
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Computer Networking: A Top-Down Approach (7th Edi...
Computer Engineering
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:PEARSON
Text book image
Computer Organization and Design MIPS Edition, Fi...
Computer Engineering
ISBN:9780124077263
Author:David A. Patterson, John L. Hennessy
Publisher:Elsevier Science
Text book image
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:9781337569330
Author:Jill West, Tamara Dean, Jean Andrews
Publisher:Cengage Learning
Text book image
Concepts of Database Management
Computer Engineering
ISBN:9781337093422
Author:Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:Cengage Learning
Text book image
Prelude to Programming
Computer Engineering
ISBN:9780133750423
Author:VENIT, Stewart
Publisher:Pearson Education
Text book image
Sc Business Data Communications and Networking, T...
Computer Engineering
ISBN:9781119368830
Author:FITZGERALD
Publisher:WILEY