Philips CPWUA054 User Manual page 28

Wireless USB Adapter 11g
R
Roaming - The ability to use a wireless device and be able to move from one access point's
range to another without losing the connection.
RTS/CTS Threshold Value - Should remain at its default setting of 2,347. A preamble is a
signal used to synchronize the transmission timing between two or more systems. A series of
transmission pulses is sent before the data to indicate that "someone is about transmit data."
This ensures that systems receiving the information correctly when the data transmission
starts.
S
Shared Key - Is when both the sender and recipient share a secret key. Both units use this
key for an extended length of time, sometimes indefinitely. Any eavesdropper that discovers
the key may decipher all packets until the key is changed.
Signal Strength - The signal level indicates the strength of the signal as received at the
wireless network interface.
SNMP (Simple Network Management Protocol) - A standard network protocol that can be
used to manage networks locally, or worldwide via the Internet.
Spread Spectrum - Spread Spectrum technology is a wideband radio frequency technique
developed by the military for use in reliable, secure, mission-critical communication systems.
It is designed to trade off bandwidth efficiency for reliability, integrity, and security. In other
words, more bandwidth is consumed than in the case of narrowband transmission, but the
trade off produces a signal that is, in effect, louder and thus easier to detect, provided that
the receiver knows the parameters of the spread-spectrum signal being broadcast. If a
receiver is not tuned to the right frequency, a spread –spectrum signal looks like background
noise. There are two main alternatives, Direct Sequence Spread Spectrum (DSSS) and
Frequency Hopping Spread Spectrum (FHSS).
SSID (Service Set Identifier) - Is the unique name shared among all points in a wireless
network. The SSID must be identical for all points in the network. It is case sensitive and
must not exceed 32 characters.
Static IP Address - A permanent IP address that is assigned to a node in an IP or a TCP/IP
network.
Subnet - A subnet is a logical sub-division of a Local Area Network that has been divided by
means of routers or gateways. A subnet may include multiple LAN segments. Each subnet is
identified by the Subnet Mask.
T
TCP/IP (Transmission Control Protocol/Internet Protocol) - The basic communication
language or protocol of the Internet. It can also be used as a communications protocol in a
private network (either an intranet or an extranet). When you are set up with direct access to
the Internet, your computer is provided with a copy of the TCP/IP program just as every other
computer that you may send messages to or get information from also has a copy of TCP/IP.
W
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