This document introduces several key networking performance metrics: - Bandwidth refers to the capacity or speed of a network link measured in bits per second. - Latency is the delay incurred as data travels from source to destination, including transmission and propagation delays. - Throughput is the actual number of bits that can be transmitted through a network per unit time, often lower than bandwidth due to other network factors. - The bandwidth-delay product represents the number of bits that can fill the "pipe" of a network link, defined by the product of its bandwidth and latency. It is an important concept for optimizing network performance.