CompTIA A+ Core 1 (220-1101) Certification Practice Exam

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What is the maximum value for each number in an IPv4 address?

512

128

255

In an IPv4 address, each address consists of four octets, which are the segments separated by dots (for example, 192.168.1.1). Each of these octets is represented as an 8-bit binary number. This means that the maximum value for each octet can be calculated using the highest number that can be represented with 8 bits.

An 8-bit binary number can represent values from 0 to 255, which is achieved because the largest binary number in 8 bits is 11111111. When converted to decimal, this binary number equals 128 + 64 + 32 + 16 + 8 + 4 + 2 + 1, totaling 255.

Therefore, the maximum value for each number in an IPv4 address is 255. Understanding this is important for subnetting, assigning static IP addresses, and ensuring that configurations meet the necessary requirements for networking.

1024