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Chapter 9: Glossary
PN 365-095-33947 x.1 SBV2402 Internet & Voice cable modem for Xfinity® customers user guide
34
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.
R
RF
Radio frequency. Some literature refers to
coax as “RF cable” and the connectors as “RF
connectors.”
RJ-11
A standard 2 conductor modular connector. It
is commonly used in North America for
connecting telephones.
RJ-45
A standard 8-conductor modular connector
commonly used on Ethernet cable. An RJ-45
connector looks like a wide RJ-11 (telephone)
connector.
S
Splitter
A small box with three cable connectors:
one input and two outputs. You may need
a splitter if you have a TV already
connected to the cable outlet that you
want to use for your SBV2402.
You can buy a splitter from any electronics
retailer and most discount stores.
Switched outlet
A power outlet that may be turned on and
off using a wall switch. Usually intended for
lamps. Avoid plugging your computer or
SBV2402 into a switched outlet to avoid
disruptions.
T
TCP/IP
Transmission control protocol/internet
protocol. The protocols used to facilitate
communications across one or more
connected networks.
TDMA
Time division multiple access. A method
used by DOCSIS-compliant cable modems
for sending upstream data with minimal
interference.
U
Upstream
The path from a subscriber device to the
headend. Some older cable documentation
may refer to this as the return path or
reverse path.
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