Glossary - Ericsson HM410dp User Manual

Glossary

Glossary
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.
Bridging
Passing data from your network to your ISP
and vice versa using the hardware addresses
of the devices at each location. Bridging
contrasts with routing, which can add more
intelligence to data transfers by using network
addresses instead.
Broadband
A telecommunications technology that can
send different types of data over the same
medium. DSL is a broadband technology.
Broadcast
To simultaneously send the same message to
multiple recipients.
DHCP - Dynamic Host Configuration
Protocol
DHCP automates address assignment and
management. When a computer connects to
the LAN, DHCP assigns it an IP address from
a shared pool of IP addresses; after a
specified time limit, DHCP returns the
address to the pool.
DNS - Domain Name System
The DNS maps domain names into IP
addresses. DNS information is distributed
hierarchically throughout the Internet among
computers called DNS servers. When you
start to access a web site, a DNS server
looks up the requested domain name to find
its corresponding IP address. If the DNS
server cannot find the IP address, it
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communicates with higher-level DNS servers
to determine the IP address.
Domain name
A domain name is a user-friendly name used
in place of its associated IP address. Domain
names must be unique; their assignment is
controlled by the Internet Corporation for
Assigned Names and Numbers (ICANN).
Domain names are a key element of URLs,
which identify a specific file at a web site.
Download
To transfer data in the downstream direction,
i.e. from the Internet to the user.
Encapsulation
A technology that enables one network to
send its data via another network's
connections. Encapsulation works by
encapsulating a network protocol within
packets carried by the second network.
Encapsulation is also called tunneling.
FTP - File Transfer Protocol
A program used to transfer files between
computers connected to the Internet.
Common uses include uploading new or
updated files to a web server, and
downloading files from a web server.
Host
A device (usually a computer) connected to a
network.
HTTP - Hypertext Transfer Protocol
HTTP is the main protocol used to transfer
data from web sites so that it can be
displayed by web browsers.
Hub
A hub is a place of convergence where data
arrives from one or more directions and is
forwarded out in one or more directions. It
1553-ZAT 759 94 Uen A – October 2004