ProSoft Technology inRA-x ILX34-AENWG, Руководство по установке

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Glossary of Terms ILX34-AENWG ♦ POINT I/O Platform
Setup Guide Wireless Point I/O Adapter
ProSoft Technology, Inc.
Page 67 of 79
July 31, 2009
Fully qualified domain name
A fully qualified domain name (FQDN) is a domain name that includes all higher
level domains relevant to the entity named. If you think of the DNS as a tree-
structure with each node having its own label, a fully qualified domain name for a
specific node would be its label followed by the labels of all the other nodes
between it and the root of the tree. For example, for a host, a FQDN would
include the string that identifies the particular host, plus all domains of which the
host is a part, up to and including the top-level domain (the root domain is always
null). For example, PARIS.NISC.SRI.COM is a fully qualified domain name for
the host at 192.33.33.109.
G
Gain
The amount by which an antenna concentrates signal strength in a wireless
network.
Gateway
In wireless terms, a gateway is an access point with additional software
capabilities such as providing NAT and DHCP.
H
Half-Duplex
A communications circuit or system designed to transmit and receive data, but
not both simultaneously. CB or walkie-talkie radios are an example of a half-
duplex communication system. Either parties on a radio conversation may talk or
listen; but both cannot talk at the same time without corrupting each other's
signal. If one operator is "talking", the other must be "listening" to have
successful communication.
Hardware address
Each Ethernet device has a unique hardware address (sometimes called a MAC
address) that is 48 bits. The address appears as six digits separated by colons
(such as, xx:xx:xx:xx:xx:xx). Each digit has a value between 0 and 255 (0x00 to
0xFF). This address is assigned in the hardware and cannot be changed. The
hardware address is required to identify the device if you are using a BOOTP
utility.
Host name
The host name is the unique name for a computer within its domain. This is
always the first element of a full name, and, with its domain and top-level domain
suffix, creates the unique name of that computer on the Internet. For example,
the URL for a trading web site is www.trading.com. The host name is www, which
is not unique on the web, but is unique within the trading domain.