Bjorn said:
Is email transmitted through signals, or cables, radio tranmission?
Does anyone know? I understand SMTP (Connects to a server) Pop, IMAP
connects to a server to pick up your mail. I do not understand how
the actual connecion is made?
The physical connection works in many different ways. First you have to
connect to your mail SMTP) server. That can be via a voice-grade telephone
line, DSL, Cable, satellite,wireless (radio), etc. Then your server has to
connect though the internet to get to the server of the recipient of the
message--again, any or all of the various technologies can be used, and
there can be multiple links (or "hops," as they are called) involved in the
connection, each using a different technology. Then the message has to be
sent from the recipient's server to his computer, and again that depends on
what kind of connection he has.
So the answer is that there are multiple connections, rather than a single
one, and various technologies can be used for the connections along the way.
