In a Class A address, how many octets are allocated for host addresses?

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

In a Class A address, how many octets are allocated for host addresses?

Explanation:
Understanding how classful IPv4 addressing divides bits helps here. In Class A, the first octet is the network portion, using a default subnet mask of 255.0.0.0. That leaves the remaining three octets for host addresses within that network. So the host portion occupies three octets. This setup allows a very large number of hosts per Class A network (about 16 million, with a couple addresses reserved in practice).

Understanding how classful IPv4 addressing divides bits helps here. In Class A, the first octet is the network portion, using a default subnet mask of 255.0.0.0. That leaves the remaining three octets for host addresses within that network. So the host portion occupies three octets. This setup allows a very large number of hosts per Class A network (about 16 million, with a couple addresses reserved in practice).

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