The value of any IPv4 octet can be from 0 to 256.

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Multiple Choice

The value of any IPv4 octet can be from 0 to 256.

Explanation:
An IPv4 octet is 8 bits, so it can represent 2^8 = 256 distinct values. Counting from zero gives all values from 0 to 255 inclusive. That means 256 cannot be represented in a single octet, since it would require a ninth bit. Therefore the valid range for an IPv4 octet is 0 through 255, and the statement including 256 is not correct. An IPv4 address is four such octets in dotted decimal form, ranging from 0.0.0.0 to 255.255.255.255. (Note that 0 and 255 have special roles in certain networking contexts, but the numeric per-octet range remains 0–255.)

An IPv4 octet is 8 bits, so it can represent 2^8 = 256 distinct values. Counting from zero gives all values from 0 to 255 inclusive. That means 256 cannot be represented in a single octet, since it would require a ninth bit. Therefore the valid range for an IPv4 octet is 0 through 255, and the statement including 256 is not correct. An IPv4 address is four such octets in dotted decimal form, ranging from 0.0.0.0 to 255.255.255.255. (Note that 0 and 255 have special roles in certain networking contexts, but the numeric per-octet range remains 0–255.)

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