Skip to main content

History of Internet.

Hi Guys,
              We all know about Internet.As we know first computer was invented by Charles Babbage in 19th century.So question arise who invented Internet.On October 29, 1969 ,a team of defense engineers at the University of Los Angeles-California (UCLA) sent the first-ever instant message via computer to another team thousands of miles away at Stanford University(SRI).


history of Internet.                                                             
                                                 Initial concepts of wide area network originated in several computer science laboratories in the United States, United Kingdom, and France.The US Department of Defense awarded contracts as early as the 1960s, including for the development of the ARPANET project,directed by Robert Taylor and managed by Lawrence Roberts. The first message was sent over the ARPANET in 1969 from computer science Professor Leonard Kleinrock's laboratory at  University of Los Angeles-California (UCLA) to the second network node at Stanford University.

                                                  Leonard Kleinrock: “At the UCLA end, they typed in the ‘l’ and asked SRI [by phone] if they received it; ‘got the l’ came the voice reply. UCLA typed in the ‘o’, asked if they got it, and received ‘got the o’. UCLA then typed in the ‘g’ and the darned system CRASHED! Quite a beginning. On the second attempt, it worked fine!” By the end of the year, four host computers were connected together into the initial ARPANET.
                                                 1971 Bob Thomas at BBN creates the first computer virus called as creeper virus .This virus copied itself to computers connected to the ARPANET and displayed the message "I'm the creeper, catch me if you can!"

history of Internet.

   Ray Tomlinson in 1971 at BBN sends the first email over the ARPANET.1975        the term "worm" is first used in John Brunner's novel, The Shockwave Rider to describe a program that propagates itself through a computer  network.         November 1983 the Domain Name System (DNS) invented by Paul Mockapetris at the University of California, Irvine.
                                                             March 15, 1985 the first commercial Internet domain name, symbolics.com is registered by Symbolics Inc a computer company based in Cambridge, Massachusetts.1990 Archie  the            first Internet search engine, is developed by Alan Emtage at McGill University.
December 1990 first webside nxoc01.cern.ch, goes live.

Comments

Favourite post

Part 2 : TCS DCA python coding questions

TCS wings1 DCA python coding TCS elevate wings1 coding questions This post contains only coding questions asked in TCS digital wings1 or tcs elevate wings1 exam. If anyone want coding answer of these questions please comment me or reach me through email provided. Given a string str which consists of only 3 letters representing the color,(H) Hue, (S) Saturation, (L) Lightness, called HSL colors. The task is to count the occurrence of ordered triplet “H, S, L” in a given string and give this count as the output. This question was asked in April 21 Digital Capababilty Assessment Examples: A) Input HHSL Output 2 Explanation : There are two triplets of RGB in the given string: H at index O, S at index 2 and Lat index 3 forms one triplet of HSL. H at index 1, S at index 2 and Lat index 3 forms the second triplet of HSL. B) Input:   SHL Output: 0 Explanation : No triplets exists. In this 3 Palindrome, Given an input string word, split the string into exactly 3 palindromic substrings. Work...

Part 1 : TCS DCA python coding questions

TCS wings1 DCA python coding TCS elevate wings1 coding questions This post contains only coding questions asked in TCS digital wings1 or tcs elevate wings1 exam. If anyone want coding answer of these questions please comment me or reach me through email provided. Find how many Sexy Prime Numbers in a given range k and p.  Sexy prime means the prime numbers that differ from each other by 6. Where difference between two sexy prime numbers is 6. Constraint: 2 <=p<k<= 1000,000,000. Sample Input: 4  40 Output: 7 Explanation: [5,11] [7,13] [11,17] [13,19] [17,23]  [23,29] [31,37] Problem Description -: Given two non-negative integers n1 and n2, where n1 For example: Suppose n1=11 and n2=15. There is the number 11, which has repeated digits, but 12, 13, 14 and 15 have no repeated digits. So, the output is 4. Example1: Input: 11 — Vlaue of n1 15 — value of n2 Output: 4 Example 2: Input: 101 — value of n1 200 — value of n2 Output: 72 Consider the string S1 = 321 All char...

Calculator program using python tkinter

Project Name:- Simple Calculator Software using Python Tkinter. Dependencies:-                           1)Install  Tkinter- https://www.techinfected.net/2015/09/how-to-install-and-use-tkinter-in-ubuntu-debian-linux-mint.html                                 2)Install Math Library- for python3- pip3 install math  for python2- pip install math  ******************************************//************************************************************************ from tkinter import * from math import * class cal: def press( self ,n): self .text.insert(INSERT,n) def dl( self ): self .text.delete( 1.0 , 2.0 ) def equal( self ): self .exp= self .text.get( 1.0 ,END) try : self .result= eval ( self .exp) self .text.delete( 1.0 , 2.0 ) ...