The term "slash notation" refers to the way a processor reads an IP address. The "Watchguard" website gives a table showing the most common network masks and their equivalent in slash notation.
period
period
240.185.8.103
12
Octets
dotted decimal notation
Dotted-decimal notation is a method of representing IP addresses in a human-readable format. It consists of four decimal numbers separated by dots, where each number can range from 0 to 255. For example, the IP address 192.168.1.1 is expressed in dotted-decimal notation. This format is commonly used for IPv4 addresses to simplify the identification of devices on a network.
An IPv4 address represented in dotted decimal notation consists of four octets, each ranging from 0 to 255. Each octet is 1 byte, so the total size of an IPv4 address is 4 bytes. Thus, an IPv4 address in dotted decimal notation is 4 bytes in size.
Dotted decimal notation
Dotted-decimal notation
A 23-bit subnet mask in dotted decimal notation is represented as 255.255.254.0. This is derived from converting the first 23 bits to binary, which results in 11111111.11111111.11111110.00000000. When converted to decimal, the first two octets are 255, the third octet is 254, and the last octet is 0.
255.255.248.0