Thanks for the reply.

It is a cable modem. The 10.x.x.x router that I am talking about is located in my apt building. But you are right when you say it is going over a cable line. It is my computer -> ethernet cable -> cable modem -> coaxial cable -> 4 way splitter -> coaxial cable -> some cable router (which is the 10.x.x.x). So are you saying that even though the physical distance between my cable modem and the router is only few yards, the cabling and cable router adds problems? What in that setup would cause packet loss? Thanks.