Which three statements properly describe Frame Relay?
a. Frame Relay works at the application layer.
b. The connection to the network edge is often a leased line, but dialup connections are available from some providers using ISDN or xDSL lines.
c. Frame Relay implements no error or flow control.
d. Available data rates for Frame Relay are commonly up to 10 Mbps.
e. Most Frame Relay connections are SVCs rather than PVCs.
f. Frame Relay provides both PVC and SVC service using shared medium-bandwidth connectivity that carries both voice and data traffic.
B, C, F