DG-BR4000N/E User Manual
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Manufacturer ID (unique for each manufacturer), plus 3 bytes that are often used as the
product’s serial number.
NAT:
Network Address Translation. This process allows all the computers on your home
network to use one IP address. Using the broadband router’s NAT capability, you can access
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:
Application
Protocol Port Number
Telnet
TCP
23
FTP
TCP
21
SMTP
TCP
25
POP3
TCP
110
H.323
TCP
1720
SNMP
UDP
161
SNMP Trap
UDP
162
HTTP
TCP
80
PPTP
TCP
1723