Which two criteria must be met to support the ICMP echo IP SLA? (Choose two )
A. The source and destination devices must be Cisco devices
B. The source device must be a Cisco device, but the destination device can be from any vendor
C. The source device must be runing Layer 2 services
D. A default gateway must be configured for the source and destination devices
E. The destination device must support the echo protocol.
The destination device must support echo protocol.
so correct answer : B & E
B and E are correct.