Which three statements about fragmentation are true? (Choose three.)
A.
The fragment size is determined by the MTU size of the network interface layer.
B.
The fragment size always remains constant for a packet across all networks through which the packet passes.
C.
Fragmentation is a mechanism for dividing a class of IP addresses to allow more efficient use of the address space.
D.
Fragmentation occurs, when necessary, at each router a packet passes through based on the MTU for the interface.
E.
Fragmentation is a mechanism for dividing data where the volume of data is more than can be transmitted in a single packet.
F.
Fragmentation only applies when the upper layer protocol is TCP because TCP delivers a continuous stream of data that must be fragmented.