Which two statements are true of a network mask? (Choose two.)

Which two statements are true of a network mask? (Choose two.)
A . A subnet mask specifies the portion of an IP address that is in a binary format.
B . A subnet mask specifies the portion of an IP address that is in a decimal format.
C . A subnet mask specifies the portion of an IP address that represents a network prefix.
D . A subnet mask specifies the portion of an IP address that represents network hosts.

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Answer: C, D