i thik its bad.
There is no danger sending (or receiving) an attachment. It is the content of them that can cause problems. Many hackers and vandals hide virus' in attachments. That is the danger. Do not open one unless you know the sender.
no, absolutely not. A computer only can be infected by receiving or downloading a file with a keylogger.
Ephemeral port
POP3
http://support.microsoft.com/kb/923200 When the sending computer sends FIN, the state of the TCP connection is set to FIN_WAIT_2. After the TCP connection has been closed, the sending computer sends RST in order to reset the connection if the receiving computer sends any packets to the sending computer.
E-mail enables the sending and receiving of files.
When they are connected over your network (LAN) you can share a folder on the receiving computer and on the sending computer you open up my network places and select the receiving computer's shared folder or goto computers near me, select the receiving computer, open up the shared folder, and just copy and paste! there are other ways but that's so simple only a baby couldn't do it!
dropbox.com
Yes, a fax is capable of sending and receiving messages from another fax machine.
The Wi-Fi works with the router receiving information from the internet. It then translates it into the radio signal and sending it to the computer wireless adapter.
sending and receiving messages