Lecture TCP-IP protocol suite - Chapter 4: IP addresses: Classful addressing

In this chapter, you will learn: Understand IPv4 addresses and classes, identify the class of an IP address, find the network address given an IP address, understand masks and how to use them, understand subnets and supernets.

ERROR:connection to 10.20.1.101:9315 failed (errno=111, msg=Connection refused)
ERROR:connection to 10.20.1.101:9315 failed (errno=111, msg=Connection refused)