5. ATM Networking

WAN Technology

UNI	native ATM/AAL1...5 cell input
IP	classical IP
Ethernet	LAN Emulation, standardized
Token Ring
FR	frame relay
FDDI,...

ATM is connection-oriented using Virtual Circuits/Paths

VCI/VCP is pre-established by routing

- cells are switched on VCI/VPI

very fast hardware-based table look-up switching

incompatible with connection-less higher layers, such as IP

- temporary VCI setup and tear-down (20...30sec)