How the Internet Was Invented: Part 1 | Summary and Q&A

March 1, 2017
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How the Internet Was Invented: Part 1


This video explores the evolution of the Internet, from the creation of ARPANET to the development of DNS, highlighting key innovations and challenges along the way.

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Questions & Answers

Q: How did packet switching change the way data is transmitted on the internet?

Packet switching replaced circuit switching, allowing multiple computers to send messages along the same set of wires instead of following one uninterrupted circuit. This revolutionized internet communication by allowing immediate connections to multiple computers simultaneously.

Q: What were some early challenges in the growth of ARPANET?

One challenge was the need to update and sync addresses across all computers connected to ARPANET. Stanford was initially responsible for maintaining the addresses but struggled with the increasing size of the network. This led to the development of DNS to reorganize the internet's structure and effectively manage addresses.

Q: How did the introduction of TCP/IP improve internet connectivity?

TCP/IP, introduced in the early 1980s, standardized packet formatting and address assignment. By using TCP/IP, different networks could easily connect since they all spoke the same language, facilitating the expansion and interconnection of networks to form the internet as we know it today.

Q: Why was the creation of DNS significant for the growth of the internet?

DNS provided a system for organizing and managing addresses on the internet. It introduced top-level domains and arranged hosts into domains, making it easier to navigate and connect within the expanding network. DNS also allocated computers specifically for address and connection tracking, simplifying tasks such as sending emails.

Q: How did the internet transition from a project of the Department of Defense to a global network?

By the late 1980s, the Department of Defense realized the internet had grown beyond its original purpose and sought someone to take over its management. The transition involved finding a new governing body to run the internet and addressing accessibility concerns to make it available to the general public.

Summary & Key Takeaways

  • During World War II, physicist Richard Feynman developed a system for computers to work on multiple problems simultaneously, leading to the acceleration of calculations.

  • In the 1950s and 60s, computer terminals were separated from computers themselves, resembling an early form of cloud computing.

  • ARPANET, funded by ARPA, was created in 1969 as the first network connecting computers at UCLA, UC Santa Barbara, Stanford University, and the University of Utah, and it laid the foundation for the internet we know today.

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