When to use KB or kbit in traffic reports?

Most of the time we find ourselves confusing the two units; KB or kbit ! Here is to clear the confusion:

kbit (kilo-bits) is best used to represent throughput/bandwidth/speed of a network interface hence the unit kbit/s

for example, you can use kbit/s when reporting bandwidth or throughput

whereas KB (kilo-bytes) is best used to represent the total traffic that has passed through a network interface in a given period of time. KB is also used to represent storage capacity in computer memories.

you can use KB to report Total Traffic downloaded or uploaded through an interface