CIDR improves routing in several ways:
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Aggregation of Routes: CIDR allows multiple IP addresses to be represented as a single routing entry. This is known as route aggregation or supernetting. For example, instead of having separate entries for each IP address in a range, a single CIDR notation can represent the entire range, reducing the size of routing tables.
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Efficient Use of IP Addresses: CIDR enables more flexible allocation of IP addresses, allowing networks to be sized according to actual needs rather than fixed class sizes. This helps in conserving IP address space.
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Reduced Routing Table Size: By aggregating routes, CIDR reduces the number of entries in routing tables. Smaller routing tables lead to faster routing decisions and improved performance in routers.
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Improved Scalability: CIDR supports a hierarchical addressing structure, which helps in managing large networks and simplifies the routing process as networks grow.
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Better Management of IP Address Space: CIDR allows for more precise control over the distribution of IP addresses, which can help in managing and optimizing the use of available address space.
Overall, CIDR enhances the efficiency and scalability of routing on the Internet.
