Which of the following statements is NOT true for the network layer of the TCP$/$IP protocol?

a$.$

The network layer provides services to the transport layer.

b$.$

The network layer carries the payload of data from source to destination without changing it$.$

c$.$

If a data packet gets fragmented along the way, the network layer sends the fragments as they arrive.

d$.$

Data packets in the network layer can be lost, get corrupted or get duplicated.