Black Box WRT-300BGN-R2, User Manual

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Appendix B: Glossary
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 UCP 161
SNMP Trap UDP 162
HTTP TCP 80
PPTP TCP 1723
PC Anywhere TCP 5631
PC Anywhere UDP 5632
PPPoE: Point-to-Point Protocol over Ethernet. Point-to-Point Protocol is a secure data transmission method originally created for
dialup 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 confu-
sion 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 (for
example, 255.255.255.0) configured like an IP address. It is used to create IP address numbers used only within a particular net-
work (as opposed to valid IP address numbers recognized by the Internet, which must be assigned by InterNIC).
TCP/IP, UDP: Transmission Control Protocol/Internet Protocol (TCP/IP) and Unreliable Datagram Protocol (UDP). TCP/IP is the stan-
dard protocol for data transmission over the Internet. Both TCP and UDP are transport layer protocol. TCP performs proper error
detection and error recovery, and thus is reliable. UDP on the other hand is not reliable. They both run on top of the IP (Internet
Protocol), a network layer protocol.
WAN:
Wide Area Network. A network that connects computers located in geographically separate areas (for example, different
buildings, cities, countries). The Internet is a wide area network.
Web-based management Graphical User Interface (GUI): Many devices support a graphical user interface that is based on
the Web browser. This means you can use the familiar Netscape
®
or Microsoft
®
Internet Explorer
®
to control/configure or monitor
the device being managed.