4. Appendix
AirLive WN-250R User’s Manual 150
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).
TCP/IP, UDP:
Transmission Control Protocol/Internet Protocol (TCP/IP) and Unreliable
Datagram Protocol (UDP). TCP/IP is the standard 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 (e.g. different buildings, cities, countries). The Internet is a wide area
network.
