User's Manual

Page 118
NewStream User Guide and Technical Manual
Term Defi nition
SSID Service Set Identifi er
The SSID is a case-sensitive, alphanumeric, 32 - character unique identifi er
attached to the header of packets sent over a wireless local-area network
[WLAN] that acts as a password when a mobile device attempts to connect
with a Basic Service Set [BSS] which is a component of the IEEE 802.11
WLAN architecture. An SSID is also referred to as a Network Name because
essentially it is a name that identifi es a wireless network.
The SSID differentiates one WLAN from another, so all Access Points and all
devices attempting to connect to a specifi c WLAN must use the same SSID
to enable effective roaming. As part of this association process, a wireless
client must have the same SSID as that entered in the Access Point or it will
not be permitted to join the BSS.
Subnet Mask A sub-network, or subnet, is a logically visible subdivision of an IP Network.
All computers that belong to a subnet are addressed with a common,
identical, most-signifi cant bit-group in their IP address. This results in the
logical division of an IP address into two fi elds: a network or routing prefi x
and the rest fi eld or host identifi er. The rest fi eld is an identifi er for a specifi c
host or network interface. Special gateways called routers exchange traffi c
between sub-networks. Such routers constitute the logical or physical
boundaries between the subnets.
Symbol Rate Symbol Rate [aka baud or modulation rate] is the number of symbol changes
[i.e. waveform changes or signalling events] made to the transmission
medium per second using a digitally modulated signal or a line code. The
Symbol rate is measured in baud [Bd] or symbols/second. In the case of a
line code, the symbol rate is the pulse rate in pulses/second. Each symbol
can represent or convey one or several bits of data. The symbol rate is
related to, but should not be confused with, the gross bitrate expressed in
bits/second.
TCP/IP Transmission Control Protocol/Internet Protocol
Transmission Control Protocol is a connection-oriented Internet protocol
requiring synchronization between the end units [source and destination] for
handshaking purposes for guaranteed message delivery that is transmitted
over the Internet Protocol, which is the low-level protocol of most internet
hardware
TNC Threaded Neill–Concelman
A TNC connector is a threaded version of the BNC connector. The connector
has a 50 Ω impedance and operates best in the 0 to 11 GHz frequency
spectrum. It has better performance than the BNC connector at microwave
frequencies.
WAN Wide Area Network
A network provided by telephone and cell phone companies to provide data
communications to users over a large geographic area.
WLAN Wireless [Wi-Fi] Local Area Network
A Wireless Local Area Network links two or more devices using some
wireless distribution method and usually providing a connection through an
access point to the wider Internet. This provides the mobility to move around
within a local coverage area and still be connected to the network. Most
modern WLANs are based on IEEE 802.11 standards, marketed under the
Wi-Fi brand name.