The valid IPv4 addresses are A. 1.1.1.1 , C. 54.45.43.54, and D. 255.255.255.0
Valid IPv4 addresses are 32 bits in size and normally contain three periods and four octets like 1.1.1.1, and the value can be any number from zero to 255.
IPv4 means Internet Protocol version 4. It is a set of address that identifies a network interface on a computer.
Thus, the only invalid address according to IPv4 standards is B. 345.0.24.6, with others regarded as valid IPv4 addresses.
Learn more about IPv4 here: https://brainly.com/question/19512399