TestOut LabSim A+ Certification Practice Exam

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Prepare for the TestOut LabSim A+ Certification Exam with in-depth flashcards and detailed multiple choice questions. Each query is accompanied by hints and comprehensive explanations. Ace your certification with thorough preparation!

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Which of the following options are not valid IP addresses?

192.168.0.1
45.22.156.256
145.8.260.7
257.0.122.55

The correct answer is: 45.22.156.256

To identify which of the options are not valid IP addresses, it's essential to understand the structure of an IPv4 address. An IPv4 address consists of four octets, each separated by a period. Each octet can range from 0 to 255. This means that any part of the address exceeding 255 or having invalid numerical characters is not valid. In the case of option B, the IP address 45.22.156.256 contains an octet (256) that exceeds the maximum allowable value of 255, thus making it an invalid address. Similarly, option C includes the octet 260 which also exceeds the permissible range. Option D has the octet 257, which again is outside the valid range. However, the question requests the identification of the answer among the provided options regarding validity, making option B the most direct example due to it being a straightforward excess that illustrates unacceptability in IP formation. Thus, option B is the appropriate answer, as it presents the clearest breach of the rules governing valid IPv4 addresses.