ZyXEL Communications X650 User Manual page 150

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
PPPoE: PPPoE stands for 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 and without any confusion or
misunderstandings.
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).
TCP/IP, UDP: TCP/IP stands for Transmission Control Protocol/Internet Protocol (TCP/IP)
and UDP stands for Unreliable Datagram Protocol (UDP). TCP/IP is the standard protocol for
data transmission over the Internet. Both TCP and UDP are transport layer protocols. TCP
23
21
25
110
1720
161
162
80
1723
5631
5632
148