MCQ-19 | IPv4 Class-A Addressing: Which Bits Are Fixed?
*Question-19: Which of below bits are fixed for Class-A?*
In Class-A IPv4 addressing, the first bit in the first octet is always set to 0, which is fixed. This bit determines that the IP address belongs to Class-A. The remaining seven bits are used for the network identification portion of the address, while the remaining three octets are used for host identification. The network portion of a Class-A IPv4 address ranges from 0.0.0.0 to 127.255.255.255, providing a maximum of 2^7 (128) possible network IDs, and each network can have up to 2^24 (16,777,216) possible hosts.
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