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