Question:

Arrange the evolution of networking as per the development timeline:
(A) The Berners-Lee at CERN developed HTML and URL, thus giving birth to World Wide Web (www).
(B) TCP/IP introduced as standard protocol on ARPANET.
(C) Roy Tomlinson develops network messaging or -mail symbol@ comes to mean "at".
(D) ARPANET became functional by connecting UCLA and SRI.
Choose the correct answer from the options given below:

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Key Networking History Timeline:
1969: ARPANET (UCLA & SRI) $\rightarrow$ 1971: Roy Tomlinson email (@) $\rightarrow$ 1983: TCP/IP standard protocol $\rightarrow$ 1990: Tim Berners-Lee WWW HTML.
Updated On: Sep 7, 2026
  • (A), (B), (C), (D)
  • (D), (C), (B), (A)
  • (B), (A), (D), (C)
  • (C), (B), (D), (A)
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The Correct Option is B

Solution and Explanation

Concept:
Computer networking originated under military and research funding in the late 1960s and evolved through standardized communication protocols before culminating in the World Wide Web.

Step 1: Historical Timeline of Key Milestones:

1. 1969 - ARPANET initial deployment (D): ARPANET first became functional in 1969 by interconnecting the initial nodes at UCLA (University of California, Los Angeles) and SRI (Stanford Research Institute).
2. 1971 - Electronic Mail and '@' Symbol (C): Roy Tomlinson implemented the first network email on ARPANET in 1971, selecting the ‘@‘ sign to separate the user's name from their host computer.
3. January 1, 1983 - Adoption of TCP/IP (B): On the official "flag day" in 1983, ARPANET adopted the Transmission Control Protocol Internet Protocol (TCP/IP) suite as its standard communication protocol, giving birth to the modern Internet.
4. 1989-1991 - Invention of the World Wide Web (A): Tim Berners-Lee at CERN created HTML, HTTP, and URLs in 1989-1990, officially releasing the World Wide Web project to the public in 1991.

Step 2: Arranging in Chronological Sequence:

The chronological order from earliest to latest is:
(D) $1969 \rightarrow$ (C) $1971 \rightarrow$ (B) $1983 \rightarrow$ (A) $1990$.
Final Answer:
The sequence corresponds to (D), (C), (B), (A), which is option (B).
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