A. It uses a round-robin mechanism in which it sends each packet over a different link in turn.

B. It uses a weighted round-robin mechanism, in which it sends each packet over a different link in turn, but can send more packets over certain links over higher weighted.

C. It uses one of the links as an active link, the other links are in standby mode and can become active if the active link fails

D. It uses a hash of various Layer 2, 3, or 4 information in the packet, depending on the type of traffic, the switch model, and the IRF load-sharing.