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.
The approximate data usage for sending and receiving 100 text messages with no attachments is typically around 100 KB to 200 KB. This estimate assumes that each SMS message is about 1 KB in size. Factors like message encoding and any additional metadata may slightly alter this amount, but overall, it remains relatively low compared to messages with attachments.
no, absolutely not. A computer only can be infected by receiving or downloading a file with a keylogger.
Ephemeral port
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.
POP3
E-mail enables the sending and receiving of files.
Yes, most email clients and messaging platforms allow you to view attachments before sending them. Typically, when you attach a file, there is an option to preview it or check its details. This feature helps ensure that you're sending the correct files and allows you to confirm their content. Always double-check your attachments to avoid sending the wrong documents.
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.