**Bandwidth**

*Bandwidth*: The range
of frequencies a device or circuit can handle or the quantity of information which can be
moved through a device or circuit.

# Explanation

Every piece of networking hardware and every communications circuit has a finite
capacity to move information. This capacity is measured in bits per second (bps), and is
commonly referred to as the bandwidth of the device or circuit.

Different technologies have different bandwidths. For example, Ethernet
has a bandwidth of 10 Mbps, meaning it can carry up to 10,000,000 bits of information in
one second. Fast Ethernet operates at 100 Mbps, meaning it can
carry up to 100,000,000 bits of information in one second. Therefore, the bandwidth of
Fast Ethernet is ten times the bandwidth of 10 Mbps Ethernet.