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  • Hirofumi Takahashi thinks this is interesting:

An important distinction to remember when working with IPv4 addresses is that dotted decimal is just an easy way for humans to read and write IP addresses. Always remember that the router is not reading an address in terms of four octets; rather, the router sees a 32-bit binary string

From

Cover of Routing TCP/IP, Volume 1, 2/e

Note

dot notation in IP4 is for convenience for human, routers simply read 32-bit info