Which two statements are true of a network mask? (Choose two.)
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A. B. C. D.CD
A network mask, also known as a subnet mask, is used to identify the network portion and the host portion of an IP address. It is a 32-bit number that is used to divide an IP address into two parts, the network portion and the host portion. The network mask contains a series of 1s and 0s, which represent the network and host portions, respectively.
A. A subnet mask specifies the portion of an IP address that is in a binary format. This statement is true. The subnet mask is a binary number that is used to determine the network and host portions of an IP address. It is represented in dotted decimal notation, where each octet of the subnet mask is converted to its decimal equivalent. For example, the subnet mask 255.255.255.0 is represented in binary as 11111111.11111111.11111111.00000000.
B. A subnet mask specifies the portion of an IP address that is in a decimal format. This statement is false. The subnet mask is represented in dotted decimal notation, but it is a binary number. Each octet of the subnet mask represents 8 bits of the binary number.
C. A subnet mask specifies the portion of an IP address that represents a network prefix. This statement is true. The subnet mask specifies the network prefix of an IP address, which is used to determine the network portion and the host portion of the address. The network prefix is the portion of the IP address that identifies the network.
D. A subnet mask specifies the portion of an IP address that represents network hosts. This statement is false. The subnet mask specifies the network and host portions of an IP address, but it does not specify the network hosts. The host portion of the IP address identifies the specific host on the network.