[dba-Tech] Question about Ports

The sender has to know which Port to send to.

There are standard "default" ports for common applications such as 21 for Telnet, 23 for 
FTP, 25 for SMTP, 80 fro HTTP,, 110 for POP3 etc.

For a none standard port, you need to reconfigure the "client" application (browser, FFTP 
client, email program etc) to use the different port.


On 23 Apr 2009 at 10:53, Arthur Fuller wrote:

> That part I understand. The conceptual problem I'm suffering is "How does
> the sender know which port to send to?" Or does the sender merely send to
> all available ports and somehow the receiver grabs the message?
> 
> A.
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