It means there are two "computer name" are same on your network. To solve this problem Go to My computer's properties then click on computer name then click on "Change" and change your Computer name like server, client, mycomputer etc. click on Ok. The system ask you to restart your computer, click on yes and restart your computer. Your problem is solved.
If you have wireless, that is not secure.
It sends out a broadcast.
That means the message is sent, not to a single host, but to all hosts on a network. (A host may be a computer, or other communicating device.)
A network cannot contain multiple computers with the same name. You'll need to rename one of them. To do so, go into the Control Panel and open "System". Under the "Computer Name" tab, you can change the name of the computer.
arp request
the difference is that when you send a message to b. from a. b. can answer but to only a. because a. is the computer it can send anywhere at anytime and b. is a t.v. which can only send to t.v. networks anywhere but with computer networks you can send to one at a time
Nowadays almost everything can be connected to computer network starting from PDAs, PCS, laptops and ending printers, scanners, phones, security cameras and so on.
computer network
1969 -The Internet is BornThe first computer-to-computer message was sent in 1969, over ARPANET (Advanced Research Projects Agency Network), the world's first packet switching network and the precursor of the Internet. The message was sent from a computer at BBN Corp. (Bolt Beranek and Newman), a defense contractor, to one at UCLA. ARPANET was developed by the U.S. Department of Defense.
The components and guidelines in making a good computer network tutorial are the definitions of computer network tutorial, the basics of computer network tutorial and the other guidelines and specifics of computer network tutorials.
Related about computer network model
Intergalactic Computer Network