Unsolicited incoming ARP message
Currently, I have been receiving multiple pop-up bubble messages from Symantec Endpoint Protection saying "unsolicited incoming ARP reply detected, this is a kind of MAC spoofing that may consequently do harm to your computer."
What does this mean? Having I been visiting a "bad" website? As a result of this message, has SEP done or is doing something to prevent this "MAC spoofing" from harming my computer? If not, what should I do to prevent my computer from being harmed?