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Authors:
Linda Null ,julia Lobur
Chapter:
Network Organization And Architecture
Exercise:
Review Of Essential Terms And Concepts
Question:2 | ISBN:9780763704445 | Edition: 3

Question

2. What protocol device was the key to the robustness of DARPAnet?

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Answer

  • The protocol device that was key to the robustness of ARPANET (not DARPAnet) was the packet-switching technology and the implementation of the Transmission Control Protocol (TCP).
  • ARPANET was an early precursor to the modern internet, developed by the Advanced Research Projects Agency (ARPA) of the United States Department of Defense. It utilized packet-switching, a method of transmitting data in discrete units or packets, rather than relying on dedicated, continuous connections.
  • The robustness of ARPANET was enhanced by the implementation of the Transmission Control Protocol (TCP), which provided reliable, error-checked data transmission over the network. TCP ensured that packets were delivered in the correct order, without loss or duplication, and it handled congestion control and flow control to prevent network overload.
  • By using packet-switching and TCP, ARPANET achieved a decentralized, distributed network architecture. This allowed for fault tolerance and the ability to reroute data dynamically in case of failures or disruptions in the network. If one path or node was unavailable, the packets could be rerouted through alternative paths, ensuring the robustness and survivability of the network.
  • The combination of packet-switching and the Transmission Control Protocol (TCP) was crucial in enabling ARPANET to become a reliable and resilient network, setting the foundation for the development of the modern internet.
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