| BASIS FOR COMPARISON | FRAME RELAY | ATM |
|---|---|---|
| Packet size | Variable | Fixed |
| Processing overhead | Increased | Decreased |
| Data transfer | Implemented in more thank one area network | Takes place within a LAN |
| Cost | Inexpensive | Cost is higher |
| Speed | Low | High |
| QoS | Quantifiable QoS is not provided | Offers quantifiable QoS |
| Error control | No support is provided for error and flow control | Error and flow control is provided |
| Data rate | 64 Kbps up to 45 Mbps | 155.5 Mbps or 622 Mbps |
| Reliability | Low | Good |
| Throughput | Medium | High |
| Delay | High | Less |