Which two statements about subnet masks are true? (Choose two.)

The correct answer is B. If a bit is turned off (0), the corresponding bit in the IP address is used for the host portion. C. If a bit is turned on (1), the corresponding bit in the IP address is used for the network prefix. Example: 255.0.0.0 (Class A network), in binary 11111111.00000000.00000000.00000000 The leftmost octet, 11111111, represents the network prefix, while the other three octets, with zeroes, represent the host portion.

Routing Fundamentals

Question

Options

AIf a bit is turned on (1), the corresponding bit in the IP address is used for the host portion.
BIf a bit is turned off (0), the corresponding bit in the IP address is used for the host portion.
CIf a bit is turned on (1), the corresponding bit in the IP address is used for the network prefix.
DIf a bit is turned off (0), the corresponding bit in the IP address is used for the network prefix.

How the community answered

(24 responses)

A
8% (2)
B
88% (21)
D
4% (1)

Explanation

Example: 255.0.0.0 (Class A network), in binary 11111111.00000000.00000000.00000000 The leftmost octet, 11111111, represents the network prefix, while the other three octets, with zeroes, represent the host portion.

Topics

#IP addressing#subnetting#network fundamentals

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