ATM service categories
Guaranteed services: CBR, VBRrt, VBRnrt
- Specific QoS guarantees from the network
- Upper bound on traffic user can send
- Traffic contract: QoS + user traffic profile
ABR services
- No performance guarantees other than minimum cell rate (MCR), but low loss expected
- No bound on traffic user can send
- Users are able to shape their traffic to varying network conditions
UBR services
- No performance guarantees
- No bounds on traffic user can send