A

measurement of data transferred to your local station from a specific network.

It is a

tool used to send IGMP packets to test whether a particular host is reachable

across an IP network.

A heartbeat

pulse generated by the Network Interface Card to tell the servers that a

connection is still active.

It is a

tool that can be used to self-test the Network Interface Card (NIC) of the

computer.

All of the

above.