User Manual

P380 Users guide
39
Glossary
Symbols:
10BaseT 10 Mbps/baseband/twisted pair. The IEEE standard for twisted pair Ethernet.
IEEE 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.
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
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.