The broadcast IPv4 address for a subnet mask of 255.255.255.0 does indeed end with .255. To understand why, let's consider the concepts of subnet masks and broadcast addresses.
In IPv4 networking, a subnet mask is a 32-bit value that is used to divide an IP address into network and host portions. The subnet mask consists of a series of 1s followed by a series of 0s. The 1s represent the network portion, while the 0s represent the host portion.
In the case of a subnet mask of 255.255.255.0, the binary representation is 11111111.11111111.11111111.00000000. This means that the first three octets (or 24 bits) are part of the network portion, while the last octet (or 8 bits) is part of the host portion.
To determine the broadcast address for a given subnet, we take the network address (which is the first address in the subnet) and set all the host bits to 1. In this case, the network address would be any IP address that has the first three octets the same as the network address and the last octet set to 0. For example, if the network address is 192.168.1.0, then any IP address in the range of 192.168.1.1 to 192.168.1.254 would be valid host addresses.
To find the broadcast address, we take the network address and set all the host bits to 1. In this case, the last octet would be set to 255, resulting in the broadcast address of 192.168.1.255. This broadcast address is used to send a packet to all hosts on the network segment.
The broadcast IPv4 address for a subnet mask of 255.255.255.0 does end with .255. This is because the subnet mask divides the IP address into network and host portions, and the broadcast address is obtained by setting all the host bits to 1.
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