Input Bytes field:
Displays the number of bytes received on the specified interface.
Output Bytes field:
Displays the number of bytes transmitted from the specified interface to any address, including those either discarded or not sent.
Input Packets field:
Displays the number of packets received on the specified interface.
Output Packets field:
Displays the number of packets transmitted on the specified interface to any address, including those either discarded or not sent.