Module 2 Lesson 2

• Internet


  Global network of billions of computers and other electronic devices, allows access to information, communication with anyone in the world, and more
• Going online

  Connecting a computer or device to the Internet
• Origins of the Internet

  1. Evolution of computer networks starting between military computers with the initial goal of maintaining the safe transition of data

  2. ARPAnet creation

  3. Addition of computers to the network

  4. Development of Transmission-Control Protocol (TCP) by Vint Cerf and Bob Kahn

  5. International connection of ARPAnet leading to the birth of the "internet"

  6. First use of the term "internet" regarding Transmission Control Protocol
• The United States Department of Defense created ARPA in response to Soviet Union’s spacecraft satellite called Sputnik


  1957
• Birth of ARPANET (ARPA Network)


  1962
• Only four computers connected to ARPAnet by the end of the year


  1969
• 23 computers in different universities and institutes in the United States connected to ARPANET, believed to be the year when Email was invented


  1971
• Development of Transmission-Control Protocol (TCP) by Vint Cerf and Bob Kahn, allowing ARPAnet to go international


  1973
• First use of the term "internet" regarding Transmission Control Protocol

  1974
• About 500 hosts (computers) connected to ARPANET


  1983
• About 1000 hosts connected to ARPANET


  1984
• Invention of the World Wide Web (WWW) by Sir Timothy John "Tim" Berners-Lee


  1989
• Development of the first web browser called WorldWideWeb


  1990
• Replacement of ARPANET by NSFNET, offering connection to the public


  1991
• Significant growth of the Internet since it was open for commercial use, establishment of the first internet in the Philippines

  1994
• Internet Search Engines Started: Yahoo, Excite, Infoseek
• March 29, 1994, 1:15 a.m.: The first internet in the Philippines was established by Benjie Tan
• The Philippines was connected to the Internet via SprintLink


  March 29, 1994
• Philippines was connected to the Internet via a Cisco 7000 router attached via the services of PLDT and Sprint communications to SprintLink's router at Stockton Ca
• Gateway to the world for the Philippines was via NASA Ames Research Center
• For now, a 64K serial link was the information highway to the rest of the Internet world
• The number of Internet hosts reaches 4 million


  1995
• The number of Internet hosts reaches 9 million


  1996
• The number of Internet hosts reaches 16 million


  1997
• According to DataReportal, 4.80 billion people around the world use the internet in July 2021
• Approximately 4 billion hosts are connected to the internet including embedded systems like smart TVs, smart houses, and the Internet of Things
• The Internet is a global network of physical cables, including copper telephone wires, TV cables, and fiber optic cables
• Wireless connections like Wi-Fi and 3G/4G rely on physical cables to access the Internet
• When you visit a website

  1. Your computer sends a request over physical cables to a server where websites are stored

  2. The server retrieves the website and sends the correct data back to your computer
• Speed of internet connection can be affected by various factors
• Backbone of the Internet can be found in physical cables including copper telephone wires, TV cables, and fiber optic cables
• Types of Internet service providers in the Philippines include PLDT, Globe, Smart, and Converge
• Types of Internet service

  • Dial-up
  • DSL
  • Cable
  • Satellite
• Dial-up is generally the slowest type of Internet connection and uses the phone line
• DSL service uses a broadband connection and does not require a landline at home
• Cable service connects to the Internet via cable TV and can be faster than dial-up and DSL service
• Satellite connection uses broadband and connects to the Internet through satellites orbiting the Earth
• Types of internet service

  • Dial-up
  • DSL
  • Satellite
  • 3G
  • 4G
  • 5G
• Satellite connection

  Uses broadband but does not require cable or phone lines
• Satellite connection

  Connects to the Internet through satellites orbiting the Earth