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  2. Virtual private network - Wikipedia

    en.wikipedia.org/wiki/Virtual_private_network

    Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).

  3. Proxy server - Wikipedia

    en.wikipedia.org/wiki/Proxy_server

    A proxy server may reside on the user's local computer, or at any point between the user's computer and destination servers on the Internet.A proxy server that passes unmodified requests and responses is usually called a gateway or sometimes a tunneling proxy.

  4. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  5. 1.1.1.1 - Wikipedia

    en.wikipedia.org/wiki/1.1.1.1

    1.1.1.1 is a free Domain Name System (DNS) service by the American company Cloudflare in partnership with APNIC. [ 7 ] [ needs update ] The service functions as a recursive name server , providing domain name resolution for any host on the Internet .

  6. National Institute of Information and Communications ...

    en.wikipedia.org/wiki/National_Institute_of...

    The National Institute of Information and Communications Technology (情報通信研究機構, Jōhō Tsūshin Kenkyū Kikō, NICT) is Japan's primary national research institute for information and communications. It is located at 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan.

  7. Allylic strain - Wikipedia

    en.wikipedia.org/wiki/Allylic_strain

    The strain energy for methylidenecyclohexane has been calculated to be 4.5 kcalmol −1 using estimations for 1,3-diaxial strain (0.9 kcalmol −1), methyl/hydrogen allylic strain (1.3kcalmol −1), and methyl/methyl allylic strain (7.6 kcalmol −1) values. [2] The strain energy in 1,8-dimethylnaphthalene was calculated to be 7.6 kcalmol −1 ...

  8. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    This is a list of articles about prime numbers.A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers.

  9. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...