Originally, a classful routing system assigned IP addresses by classifying networks as ____ to maximize the number of available IP addresses for each network.
A) Class 1 through Class 6
B) Class 1 through Class 10
C) Class A through Class E
D) Class A through Class J

Question

Quizplus · Accepted Answer

The classful routing system assigned IP addresses by classifying networks into Class A (with 8 bits for the network address and 24 bits for the host address), Class B (with 16 bits for the network address and 16 bits for the host address), and Class C (with 24 bits for the network address and 8 bits for the host address). Classes D and E were reserved for multicast and experimental purposes, respectively. This system was designed to allocate IP addresses efficiently based on the size of the network, but it eventually led to address space exhaustion and the introduction of classless inter-domain routing (CIDR).

Originally, a Classful Routing System Assigned IP Addresses by Classifying