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PPPoE (Point-to-Point Protocol over
Ethernet): A specication for connecting
users on an Ethernet line to the Internet
through a common broadband medium.
Protocol: A standard way of exchanging
information between computers.
RADIUS (Remote Authentication Dial
In User Service): A server that issues
authentication keys to clients.
RAM (Random Access Memory): Non-
permanent memory.
Repeater Hub: A device that collects,
strengthens and transmits information to
all connected devices, allowing the network
to be extended to accommodate additional
workstations. See also Bridge.
RC4: The encryption algorithm used by
WEP.
RJ-45 connector: An 8-pin connector
used between a twisted pair cable and a
data transmission device.
ROM (Read Only Memory): Memory
hardware that allows fast access to
permanently stored data but prevents
addition to or modication of the data.
Router: A device in a network that
handles message transfer between
computers. Similar to a hub, but with
added functionality and efciency.
Roaming: The ability to use a wireless
device while moving from one access point
to another without losing the connection.
Server: Any computer that makes les or
peripheral devices available to users of the
network and has a resident Network OS.
SMTP (Simple Mail Transfer Protocol):
The protocol used to dene and deliver
electronic mail (E-mail) from one location
to another.
Glossary