NAVIGATING THE INTERNET ALPHABET SOUP A global network
NAVIGATING THE INTERNET ALPHABET SOUP
�A global network that connects millions of computers all over the world. �The Internet backbone is the central network that links all the parts of the Internet together.
� ISP: Internet Service Providers sell Internet access to customers � NSP: Network Service Providers supply direct backbone access to ISPs
�A system of computers that allows you to communicate with other computers talking the same language (protocol)
� Protocol: rules for communicating between two electronic devices � Internet Protocol (IP): rules for communicating on the Internet � Hypertext Transfer Protocol (HTTP): rules for transferring web pages (HTML documents) on the Internet
� Simple Mail Transport Protocol (SMTP): protocol used for transmitting electronic mail � File Transfer Protocol: a protocol designed to transfer files between an FTP server and a computer—example: downloading software � VOIP?
� Uniform Resource Locator �Specifies the internet address of a file stored on a host computer � Example: � http: //www. d 1 baseball. com/conferences/standings_sec. htm
� Protocol – host – path – filename � Example: http: //www. d 1 baseball. com/conferences/standings_sec. htm Protocol: http: // Host: www. d 1 baseball. com Path: conferences Filename: standings_sec. htm
� Computers use a domain name system to translate URLs into numeric addresses � The numeric address is known as the Internet Protocol (IP) address; a unique address is assigned to EVERY computer or device that connects to the Internet � An IP address is a four-part number, each part consisting of a digit from 0 to 255. �Example: 207. 46. 192. 254
� TLD – Top level domain; suffix at the end of a web address �. com—commercial; generic �. edu—educational institution—higher ed �. gov—state or federal government �. mil—U. S. military �. net—network service provider (can be used generically) �. org—usually nonprofit but can be generic �. pro—professional—like physicians, lawyers, CPAs, etc. �. name—reserved for individuals
�A domain name that identifies the location of a server �Example: . us—United States. jp—Japan. uk—United Kingdom. ca—Canada. mx—Mexico �Find bkps. k 12. ar. us country codes for the following: Brazil, Egypt, Jamaica, Cayman Islands
� Provides � Reads our connection to the Internet hypertext documents � Examples: �Google Chrome �Safari �Firefox �Internet Explorer
�A document written in HTML that contains words/images that connect to another document
� Hypertext Markup Language: the language used to write web pages <!DOCTYPE html PUBLIC "-//W 3 C//DTD XHTML 1. 0 Transitional//EN" "http: //www. w 3. org/TR/xhtml 1/DTD/xhtml 1 -transitional. dtd"> <html xmlns="http: //www. w 3. org/1999/xhtml" xml: lang="en" dir="ltr"> <head> <title>Warren G. Harding - Wikipedia, the free encyclopedia</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta name="generator" content="Media. Wiki 1. 16 alpha-wmf" /> <link rel="apple-touch-icon" href="http: //en. wikipedia. org/apple-touch-icon. png" /> <link rel="shortcut icon" href="/favicon. ico" /> <link rel="search" type="application/opensearchdescription+xml" href="/w/opensearch_desc. php" title="Wikipedia (en)" /> <link rel="copyright" href="http: //creativecommons. org/licenses/by-sa/3. 0/" /
�A program that works WITH the web browser to display multimedia. �Flash �Java �Quicktime � Typically not a stand-alone program
- Slides: 18