Q60 Single choice Mark for later What is the purpose of a network mask? A It is used in conjunction with the wildcard mask to determine the number of hosts on a network. B It is used to define which parts of the IP address are allocated to host addresses and network prefixes. C It is used to hide subnets from external networks by masking the subnets with NAT. D It is used to differentiate a network as a classful network or a classless network. Correct answer