How do you know/find out whos in your network??
821373
Go to My Network Places, then depending on your operating system (i'm assuming you're using Windows XP, doesn't matter if its professional or home edition, 32 or 64bit..etc) Look on the left hand side of the box, and under the tab of Network Tasks, you'll see something that says "View network connections"\n\nClick on that and Viola! Your answer awaits =]
167704
Go to www.networksolutions.com and click on WHOIS, currently in the menu bar at the bottom of the home page. Enter the website and you'll find the name and contact information of the registered owner.
736378
The IP ADDRESS at the top of full header. Will tell you if its the same person.
820234
get one of their emails - look at the header information, find the source IP address and type that into an IP "who is" search - thsi is very brief but have a search on the Internet there are plenty of site to give help
983844
Press CTRL/ALT/DELETE at the same time and the Windows Task Manager will pop up.... Then click on the USERS tab... There you will see if others are using your wireless connection.... The best thing is to password protect your wireless connection.
656466
you cant, however you could see what IP they used to send the message. That is all you can do though!
496294
If you are using HUB in your local area network, you can get password from others. There're sniffer programs. You can use Ethereal, Cain, ...\nLet's use Yahoo to search your keyword you need :)\nBut if you are using SWITCH, I think no way for your needed.
192097
In Friendster, you would know if someone has grabbed your photo.\n\nI don't know with other networks.
845114
If you have the machine they are downloading from then you can just do a netstat to see where the connections are coming from.\n\nIf you do not know where they are downloading from then you will need to get a program like ethereal (packet analyzer) and set it up on a port on your switch that sees all local traffic.  It will record all of the traffic and provide analysis to show where the traffic is coming from.
355302
This is used for ur  identification on the network i.e., the service provider ur using.
1025157
You just were using a wirless network in your area.. which is illegal.. its owners just made a password for its access.. which you haven't
718546
Use "netstat" command. Can show what ip's are conneceted, what ports are listening, etc.
851430
This is a neat little trick I used to do, but you might have to be a little computer savvy to pull it off.\n\nFirst, open up a command prompt [Start Menu...Run...type 'cmd'...it will bring you to the black screen]. Type 'netstat -n' and it should show you a list of ip addresses you are currently connected to.\n\nNow...get that person to direct connect to you. Type 'netstat -n' again. There should be one extra ip address. This address will be the ip of the person with whom you're directly connected.
277124
If you are truly talking about the windows "Net Send" command the computer of origin is part of the message and message box.  You could then find that computer and possibly find out who was signed on at the time.
535553
Do a "WhoIs" search on Networksolutions.com.  You can find if a particular domain name is being used or not
1096629
Cut and copy this addy and put it in your address bar..........or just click on address..........\n\nhttp://en.wikipedia.org/wiki/Intrusion-detection_system\n\nThere you can read all you want on IDS.
303166
You can install a network sniffer and watch the network traffic.  If you see unexpected traffic, you can see the IP address it is coming from.