Release 34 DRAFT 1.6 June 2017 Touchstone DG3450 Data Gateway User Guide
© 2017 ARRIS Enterprises LLC. All Rights Reserved. 36
connector, slip-on and screw-on. Use coax
with screw-on connectors for connecting
your Data Gateway.
Firewall
A hardware or software device that
prevents unauthorized access to a private
network from the Internet. The DG3450
provides a built-in firewall.
G
Gateway
The device, usually a router, that connects
devices on a given IP subnet to other IP
subnets.
H
Headend
The “central office” in an HFC network. The
headend houses both video and data
equipment. In larger cable networks, a
“master” headend often feeds several
“remote” headends to provide distributed
services.
HTTP
HyperText Transfer Protocol.
Hub
A box with several Ethernet connectors.
Ethernet hubs provide a common point of
contact for all connected devices.
I
IP address
A number assigned to your computer by
your service provider, used to identify your
computer to other systems on the
Internet.
L
LAN
Local Area Network. A network that allows
computers in a single location (such as a
building) to communicate with one
another.
LED
Light Emitting Diode. A semi-conductor
diode that emits light when current is
passed through it.
M
MAC address
A number that uniquely identifies any
device connected to a network. Your
service provider uses your Data Gateway’s
MAC address to authorize access to the
Internet. The MAC address is printed on a
label on the bottom of your Data Gateway.
P
Protocol
A set of rules and formats that determines
the communication behavior of network
entities at a given layer.
Proxy
A device or program that stands in
between a server (for example, a web site)
and a client (your browser), providing a
way to relieve some of the burden from
the server. For example, your service
provider may have a web proxy that keeps
copies of popular web pages; the proxy can
send you those pages instead of fetching
them directly from the web site, resulting
in faster page loading and less network
congestion.
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