Final answer:
On an Ethernet network, if a host receives a frame with a non-matching destination MAC address, it will ignore the frame, adhering to the Ethernet protocol to maintain network efficiency.
Step-by-step explanation:
If a host on an Ethernet network receives a frame with a destination MAC address that does not match its own, it will discard or ignore the frame. Ethernet devices are designed to check the destination MAC address against their own. If there is no match, the device recognizes that the frame is not intended for it and drops the frame to free network resources for relevant traffic. This behavior is part of the fundamental operations of the Ethernet protocol, which helps to avoid unnecessary data processing and contributes to network efficiency.