DG-BG4300NU User
Manual
138
PPPoE: (Point-to-Point Protocol over Ethernet.) Point-to-Point Protocol is a secure data
transmission method originally created for dial-up connections; PPPoE is for Ethernet
connections. PPPoE relies on two widely accepted standards, Ethernet and the Point-to-Point
Protocol. It is a communications protocol for transmitting information over Ethernet between
different manufacturers.
Protocol: A protocol is a set of rules for interaction agreed upon between multiple parties so
that when they interface with each other based on such a protocol, the interpretation of their
behavior is well defined and can be made objectively, without confusion or misunderstanding.
Router: A router is an intelligent network device that forwards packets between different
networks based on network layer address information such as IP addresses.
Subnet Mask: A subnet mask, which may be a part of the TCP/IP information provided by your
ISP, is a set of four numbers (e.g. 255.255.255.0) configured like an IP address. It is used to
create IP address numbers used only within a particular network (as opposed to valid IP
address numbers recognized by the Internet, which must be assigned by InterNIC).
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
PC Anywhere TCP 5631
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