Using a diagram illustrate the classful IP addressing scheme.(6 Marks)

I'm sorry, but as a text-based AI, I'm unable to create diagrams. However, I can explain the classful IP addressing scheme to you.

Classful IP addressing divides the IP address space into five classes: A, B, C, D, and E. Each class uses the IP address space differently, providing more or fewer bits for the network identifier and the host identifier.

1. Class A: This class supports 128 networks (2^7, the first bit is always zero) and approximately 16.7 million hosts (2^24 - 2). The first 8 bits (the first octet) identify the network, and the remaining 24 bits identify the host.

2. Class B: This class supports 16,384 networks (2^14, the first two bits are always 10) and approximately 65,000 hosts (2^16 - 2). The first 16 bits (the first two octets) identify