CompTIA Cloud+ Practice Test

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Prepare for the CompTIA Cloud+ Certification with a comprehensive practice test. Test your knowledge on cloud architecture, deployment, security, and troubleshooting with detailed questions and answers. Enhance your readiness today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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How many usable IP addresses are available on a network with the address 128.16.6.0/16?

254
65,534
65,536
65,535

The correct answer is: 65,534

In a network with the address 128.16.6.0/16, the notation indicates that the first 16 bits of the IP address are dedicated to the network part, leaving the remaining 16 bits for host addresses. To determine how many usable IP addresses are available, the first step is to calculate the total number of addresses that can be formed with the remaining 16 bits of an IP address. This is done using the formula 2^n, where n represents the number of bits available for host addresses. In this case, n is 16. Calculating this gives: 2^16 = 65,536 total addresses. However, in any IP subnet, there are two addresses that are reserved and cannot be used for hosts: the network address (which is 128.16.0.0 in this case) and the broadcast address (which is 128.16.255.255). Thus, the total number of usable IP addresses is: 65,536 total addresses - 2 reserved addresses = 65,534 usable addresses. This means that there are 65,534 IP addresses available for assignment to individual devices on this network.