User Manual

User’s Guide Glossary
Glossary
Symbols:
10BASET 10 Mbps/baseband/twisted pair.
The IEEE standard for twisted pair Ethernet.
802.11b The IEEE standards for the definition
of the Wireless high-speed (11Mbit) protocol
for wireless communication.
A
Authorization the process of determining what
types of activities a user is permitted to
undertake. Usually, authorization is in the
context of authentication: once you have
authenticated a user, they may be authorized
for different types of access or activity.
Authentication - Authentication is the process of
determining whether someone or something is, in
fact, who or what it is declared to be.
B
backbone The primary connectivity
mechanism of a hierarchical distributed
system. All systems, which have connectivity
to an intermediate system on the backbone,
are assured of connectivity to each other. This
does not prevent systems from setting up
private arrangements with each other to
bypass the backbone for reasons of cost,
performance, or security.
bandwidth Technically, the difference, in Hertz
(Hz), between the highest and lowest
frequencies of a transmission channel.
However, as typically used, the amount of data
that can be sent through a given
communications circuit. For example, typical
Ethernet has a bandwidth of 100Mbps.
bps bits per second. A measure of the data
transmission rate.
D
Datagram Self-contained, independent entity
of data carrying sufficient information to be
routed from the source to the destination
computer without reliance on earlier
exchanges between this source and
destination computer and the transporting
network." a self-contained, independent entity
of data carrying sufficient information to be
routed from the source to the destination
computer without reliance on earlier
exchanges between this source and
destination computer and the transporting
network. The term has generally been
replaced by “packet”.
DHCP Dynamic Host Configuration Protocol. A
service that lets clients on a LAN request
configuration information, such as IP host
addresses, from a server.
DNS Domain Name System. The distributed
name/address mechanism used in the
Internet. It comprises distributed online
databases that contain mappings between
human-readable names and IP addresses,
and servers, which provide translation services
to client applications.
Domain A part of the DNS naming hierarchy.
Syntactically, an Internet domain name
consists of a sequence of names (labels)
separated by periods (dots), e.g.,
“machine.company.com”. See
DNS.
E
Ethernet A common, 10Mbps local area
network technology invented by Xerox
Corporation at the Palo Alto Research Center.
Ethernet is a best-effort delivery system that
uses CSMA/CD technology. Ethernet can be
run over thin wire coaxial cable (10BASE2),
thick wire coaxial cable (10BASE5), twisted
pair cable (10BASET), or fiber optic cable.
EIRP Effective Isotropic Radiated Power
Technical value that evaluates the strength of
receive signals
EPROM – EPROM (erasable programmable
read-only memory) is programmable read-only
memory (programmable ROM) that can be
erased and re-used.
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