Which of the following descriptions about  GRE  is wrong  ?  ( Choose one or more )

Which of the following descriptions about  GRE  is wrong  ?  ( Choose one or more )
A . bearing carrier  IP  header to  UDP  port number  47  identifies the  GRE  header
B . GRE  uses the Ethernet protocol type  Ox0800 to  identify the payload packet as  IP
C . GRE VPN is  limited to the transmission of unicast data
D . using  IP overIP  the  GRE  encapsulation, public network and the private network interface address may coincide

View Answer

Answer:   ACD

Explanation:

GRE  can transmit multicast, but  IPSEC  cannot