Jul 01, 2020 · A Subnet mask is a 32-bit number that masks an IP address, and divides the IP address into network address and host address. Subnet Mask is made by setting network bits to all "1"s and setting host bits to all "0"s. Within a given network, two host addresses are reserved for special purpose, and cannot be assigned to hosts.
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Dec 19, 2019 · Each of the address classes has a different default subnet mask. You can identify the class of an IP address by looking at its first octet. Following are the ranges of Class A, B, and C Internet addresses, each with an example address: Class A networks use a default subnet mask of 255.0.0.0 and have 0-127 as their first octet.
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Apr 12, 2017 · One of the most basic concepts of data networking is how devices connect and communicate within an IPv4 network. To understand this, we must look at the devices' unique IP addresses as well as the associated subnet mask and default gateway. Default mask is inbuilt network portion which is already defined in IPV4 classes. In office networks subnet mask is used. In home networks default mask is used.