After planning the IPv4 addressing scheme and determining the number and types of necessary addresses, a hierarchical design might be necessary. This design is useful when finding a scalable solution for a large organization and this involves address summarization. Summarization reduces the number of routes in the routing table and involves taking a series of network prefixes and representing them as a single summary address. It also involves reducing the CPU load and the memory utilization on network devices. In addition, this technique reduces processing overhead because routers advertise a single prefix instead of many smaller ones.
A summarizable address . . .
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