Edimax AR-7084A User Manual page 83

NAT
Network Address Translator is defined by RFC 1631. Enable a LAN network to
use one set of IP address for internal traffic. A NAT box located where the LAN
meets the Internet provides the necessary IP address translation. This helps
provide a sort of firewall and allow for a wider address range to be used internally
without danger of conflict. Using the router's NAT capability, you can access the
Internet from any computer on your home network without having to purchase
more IP addresses from your ISP.
Port
Network Clients (LAN PC) uses port numbers to distinguish one network
application/protocol over another. Below is a list of common applications and
protocol/port numbers:
PPP
PPP is the Point-to-Point-Protocol. The successor to SLIP, PPP provides router-
to-router and host-to-network connections over both synchronous and
asynchronous circuits.
Application Protocol Port Number
Telnet TCP
FTP TCP
SMTP TCP
POP3 TCP
H.323 TCP
SNMP UCP
SNMP Trap UDP
HTTP TCP
PPTP TCP
PC Anywhere TCP
PC Anywhere UDP
75
23
21
25
110
1720
161
162
80
1723
5631
5632