Bandwidth: - Throughput of the network is known as Bandwidth of network.
Latency : - Delay of the network is known as Latency of network.
Network performance is basically measured in both of the above entity Bandwidth (throughput) and Latency (Delay).
Bandwidth of any network is represented by the number of bits that are being transmitted over the network at certain point of time. and same time the latency is how long time will covered to transfer message from one end to other. Latency measurement is in terms of time.