I am using McAfee Total Protection (Trial). WHen I check my Network map i see few IPs connecting to me and they are labelled as friend. The IPs that connect to me are 192.168.1.1 and so on upto 192.168.1.6. I have flagged all of them as "intruders"..what is this? Is it harmful for my PC?? Some of the IPs even have human names.

PS: I am on a local area connection.