Which two statements are true regarding GRE tunnel overhead? (Choose two.)
A.
If the host sends a packet larger than the MTU, that packet must be dropped.
B.
Packets are not dropped because the router clears the DF bit for GRE traffic by default.
C.
Packets larger than the MTU are fragmented or dropped depending on the DF bit setting.
D.
You can change the tunnel MTU to avoid packet fragmentation or drops.