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