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What is ipv4 and ipv6 ? Let's explain.

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IPv6  is the sixth revision to the Internet Protocol and the successor to  IPv4 . It functions similarly to  IPv4  in that it provides the unique, numerical IP addresses necessary for Internet-enabled devices to communicate. However, it does sport one major difference: it utilizes 128-bit addresses. What is IPv4 (Internet Protocol Version 4)? IPv4 ( I nternet  P rotocol  V ersion  4 ) is the fourth revision of the Internet Protocol (IP) used to identify devices on a network through an addressing system. The Internet Protocol is designed for use in interconnected systems of packet-switched computer communication networks.  IPv4 is the most widely deployed Internet protocol used to connect devices to the Internet. IPv4 uses a 32-bit address scheme allowing for a total of 2^32 addresses (just over 4 billion addresses).  With the growth of the internet, it is expected that the number of unused IPv4 addresses will eventually run out because every device -- including computers, smart
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Payment Interface (UPI) initiative of Digital India by PM Narendra Modi

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A  Unified Payment Interface  ( UPI ) is a single window mobile payment system launched by the National Payments Corporation of India (NPCI). A Unified Payment Interface (UPI) is a single window mobile payment system launched by the National Payments Corporation of India (NPCI). The system is designed to provide a simple, secure and convenient “single interface” to enable sending and receiving of money using smartphones through a "single identifier" which can be a virtual address like an email ID, mobile number or Aadhaar number (like the Social Security Number). It eliminates the need to enter bank details or other sensitive information each time a customer initiates a transaction.  What does this mean for you? The UPI can be thought of like an email ID for your money. It will be a single identifier that your bank uses to transfer money and make payments using the Immediate Payments Service (IMPS) - which lets you transfer money immediately and works 24x7.
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