How many Class A networks can theoretically be created?

Study for the Internet Protocol Version 4 Test. Use flashcards and multiple-choice questions, each with hints and explanations. Master the exam with confidence!

Multiple Choice

How many Class A networks can theoretically be created?

Explanation:
In Classful IPv4 addressing, the class is determined by the first bit of the first octet. For Class A, that leading bit is 0, which leaves 7 bits to identify the network. Those 7 bits can represent 2^7 values, which is 128, so there can be 128 Class A networks theoretically. In practice, a couple of these are reserved (0 and 127 ranges), but the theoretical count is 128.

In Classful IPv4 addressing, the class is determined by the first bit of the first octet. For Class A, that leading bit is 0, which leaves 7 bits to identify the network. Those 7 bits can represent 2^7 values, which is 128, so there can be 128 Class A networks theoretically. In practice, a couple of these are reserved (0 and 127 ranges), but the theoretical count is 128.

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