A.EtherChannel technology helps aggregate traffic grouping multiple，full-duplex point-to-point linkstogether
B.EtherChannel technology is based on the 802.1 IEEE stand
C.EtherChannel can aggregate up to 800 Mbps，8 Gbps，or Gbps of aggregate bandwidth for a Fast EtherChannel，Gigabit EtherChannel，or 10 Gigabit EtherChannel connection respectively
D.EtherChannel is defined for Rapid Spanning Tree for faster convergence