What is the maximum value of an octet in Internet protocol version 4 (IPv4)?

What is the maximum value of an octet in Internet protocol version 4 (IPv4)?

• A. 239
• B. 254
• C. 255
• D. 256

Answer: (C)

In Internet Protocol Version 4 (IPv4), an octet is a grouping of 8 bits. The range of values that can be represented by an octet is from 0 to 255. This is calculated as \(2^8 - 1\) because an 8-bit binary number can have a maximum decimal value of 255 when all bits are set to 1 (i.e., 11111111 in binary). Therefore, the maximum value of an octet in IPv4 is 255, as it utilizes all 8 bits. The other options fall short of this maximum, as 239, 254, and 256 do not represent the upper limit of an 8-bit binary representation. Specifically, 256 exceeds the range of an octet since it represents the transition to a ninth bit, which is not within the confines of an individual octet in this context.

In Internet Protocol Version 4 (IPv4), an octet is a grouping of 8 bits. The range of values that can be represented by an octet is from 0 to 255. This is calculated as (2^8 - 1) because an 8-bit binary number can have a maximum decimal value of 255 when all bits are set to 1 (i.e., 11111111 in binary).

Therefore, the maximum value of an octet in IPv4 is 255, as it utilizes all 8 bits. The other options fall short of this maximum, as 239, 254, and 256 do not represent the upper limit of an 8-bit binary representation. Specifically, 256 exceeds the range of an octet since it represents the transition to a ninth bit, which is not within the confines of an individual octet in this context.