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What is a port and how does it work
#551 | 1:58 |
Thursday January 28, 2010
Tutorials
Thursday January 28, 2010
In dealing with computers and the Internet you've probably seen and heard the word "port." If you download torrent files, you've almost certainly heard of
port forwarding
. For example, the SMTP server for most email uses port 25 and FTP uses port 21, but what exactly is a "port?"Download this episode now
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Windows Media Show Notes
- You can think of each port number as being a phone number.
- Ports are used on networks to communicate between a client and a server.
- Ports allow data to be transmitted efficiently.
- Port numbers are from 0 to 65535.
- Ports 0 to 1024 are reserved for use by certain privileged services.
- Examples include SMTP = 25, POP = 110, FTP = 21.
- In the picture of a switchboard the connectors on the switchboard would be "ports".
- The cable connectors can be thought of as the information that's going to a specific port.
- On a network, ports are used to route information to specific places just as phone numbers route calls to specific people.
- Ports are used on networks to communicate between a client and a server.
- Ports allow data to be transmitted efficiently.
- Port numbers are from 0 to 65535.
- Ports 0 to 1024 are reserved for use by certain privileged services.
- Examples include SMTP = 25, POP = 110, FTP = 21.
- In the picture of a switchboard the connectors on the switchboard would be "ports".
- The cable connectors can be thought of as the information that's going to a specific port.
- On a network, ports are used to route information to specific places just as phone numbers route calls to specific people.
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