SMDS - Switched Multi-megabit Data Services (3)
SMDS vs. ATM:
- ATM is one of technologies
- SMDS is a service which can be provided by ATM, Frame Relay or can be offered without ATM.
- SMDS is the first ATM service. It offers most of the same advantages as ATM
- SMDS is data-only solution; adding time-sensitive application (audio, video) support can be relatively easy
- SMDS and ATM cells are similar, but not quite the the same. Headers (5 bytes for ATM, 7 bytes for SMDS) must be translated
- SMDS: connection-less; ATM: connection oriented