An ATM network is made up of endpoint systems that have ATM NICs and switches that move traffic between the endpoints. An endpoint could be a workstation, a server, or a router. It also might be an Ethernet, Token Ring, or FDDI switch that has an ATM interface.
An SNMP agent or a network server located within an ATM switch also can play the role of an endpoint system.
Figure 20.1 illustrates a big ATM network. As the figure shows, ATM networking is switch-based. Systems are connected to switches, and the switches are connected to each another.
ATM protocols operate at Layers 1 and 2. Unlike ...