uppercase B stands for bytes. To find your theoretical download speed for your line, divide your advertised speed by 8.192: 53.333kbps / 8.192 = 6.51 KB/s or by 10 to include overhead: 53.333kbps / 10 = 5.33 KB/s What is MTU? What should mine be? Packet size, often referred to as MTU (Maximum Transmission Unit) is the greatest amount of data that can be transferred in one physical frame on the