ATM
Originally designed for use in WAN
Standardized; simple to connect BNs and WANs
Includes Layer 3, Layer 2 and Layer 1 technologies in the specifications
- Compatible with TCP/IP and Ethernet as if ATM was Layer 2 technology
A connection oriented technology
ATM switches
- Provide point-to-point full duplex circuits at 155 Mbps (622 Mbps for switch-to-switch)