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  1. Classless Inter-Domain Routing - Wikipedia

    Classless Inter-Domain Routing (CIDR / ˈsaɪdər, ˈsɪ -/) is a method for allocating IP addresses for IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the …

  2. What is CIDR? - CIDR Blocks and Notation Explained - AWS

    Classless Inter-Domain Routing (CIDR) allows network routers to route data packets to the respective device based on the indicated subnet. Instead of classifying the IP address based …

  3. Classless Inter Domain Routing (CIDR) - GeeksforGeeks

    Oct 7, 2025 · CIDR (Classless Inter Domain Routing) is a method of IP address allocation and routing that allows more efficient use of IP addresses. Unlike traditional class based …

  4. What Is CIDR, and Why Is It Used? - Coursera

    Oct 23, 2025 · CIDR is a tool that maximizes network routing efficiency via subnetting, supernetting, and a simplified IP address notation. Classless inter-domain routing (CIDR) is a …

  5. What Is CIDR Notation in IP Addressing? (With Examples)

    Sep 4, 2025 · CIDR notation is a modern, efficient way of representing IP addresses. Unlike outdated classful addressing, CIDR allows you to size networks exactly to your needs, …

  6. CIDR Notation: A Beginner's Guide to IP Addressing

    Classless inter-domain routing (CIDR) is a set of Internet Protocol (IP) standards that is used to create unique identifiers for networks and individual devices. The IP addresses allow particular …

  7. CIDR (Classless Inter-Domain Routing or supernetting)

    Jun 13, 2024 · CIDR (Classless Inter-Domain Routing or supernetting) is a method of assigning IP addresses that improves the efficiency of address distribution and replaces the previous …

  8. What Is CIDR? Explaining Classless Inter-Domain Routing

    The definition of CIDR (Classless Inter-Domain Routing) is a network concept designed to oversee the allocation of IP addresses. Introduced in 1993, CIDR replaces the previous …

  9. CIDR: Understanding IP Addressing

    CIDR—short for Classless Inter-Domain Routing —is the notation system used to define IP address ranges in today’s internet infrastructure. CIDR has been a foundational part of IP …

  10. Understanding CIDR Notation - NRS

    Apr 18, 2025 · Classless Inter-Domain Routing (CIDR) notation provides a streamlined way to express IP addresses and subnet masks. Emerging in the early 1990s, CIDR supplanted the …