Throughput is how much data is sent and received (typically in bits per second) at any given time. In Wireshark, we can measure this as well as goodput, which is useful information that is transmitted.

Network media can affect throughput. For example, fiber optics has better throughput than copper. However, congestion and delays can also affect how much data is getting through. When there is decreased throughput, packet loss can occur, as discussed next.