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4-4
Netopia ISDN Router Reference Guide
Associating port numbers to nodes
When an IP client, such as a Netscape or Microsoft Internet Explorer
web browser, wants to establish a session with an IP server, such
as a web server, the client must know the IP address to use and the
IP port where the traffic is to be directed.
Just as an IP address specifies a particular computer on a network,
ports are addresses that specify a particular service in a computer.
There are many universally agreed-upon ports assigned to various
services. For example:
Web servers use port number 80.
FTP servers use port number 21.
Telnet uses port number 23.
SNMP uses port number 161.
The Netopia ISDN Router lets you associate these and other port
numbers to nodes on your internal LAN. See
numbers to nodes," beginning on page 4-4
accomplish this.
"Associating port
for details on how to
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