It could be one of several things.
1) You have persistent port forwarding set to a computer and information
is being sent on that port.
2) the computer is checking for updates with any of the programs you
have installed on your computer
3) it could be a virus trying to spread
4) it could be spyware or adware connecting to it's host
To check for I virus I recommend an online virus scan at
http://housecall.antivirus.com
For the spyware & adware I recommend both Spybot Search & Destroy and
ad-aware 6. Both are free downloads for home users. Update them after
the install and let them run a scan.
txm wrote:
> Thank you for the reply.
>
> Then I wonder why PCs not involved in the communication have network
> traffic.
>
> "joker" <no-(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>
>>It is a bridge/switch/router. The router connects to the wireless &
>>Switch thus bridging wireless to Twisted pair and providing switch
>
> service.
>
>>txm wrote:
>>
>>
>>>Hi all
>>>
>>>I have MN-500 and two wired PC and one wireless PC are connected to it.
>>>
>>>By some reason, I believed MN-500 is a switch, not a hub but recently I
>>>noticed that packets seemed to be sent to computers, which were not in
>
> that
>
>>>communications. How did I notice? My computers have LCDs, which blink
>
> when
>
>>>they have network traffic.
>>>
>>>Software-wise, according to task manager's network traffic graph, they
>
> do
>
>>>not receive any non-interested packets.
>>>
>>>Is MN-500 a switch or a hub?
>>>
>>>
>>>Thanks.
>>>
>>>
>>>txm
>>>
>>>
>>
>
>