Motorola SURFBOARD SVG2500 User Manual page 162

17 GLOSSARY
TERM
IGMP spoofing
impedance
impulse noise
Ingress noise
Internet
Internetwork
IP
IP address
IPSec
IKE
DEFINITION
A process where a router acts as an IGMP querier for multicast
hosts and an IGMP host to a multicast router.
The total opposition to AC electron current flow within a device.
Impedance is typically 75 ohms for coax cable and other CATV
components.
A noise of very short duration, typically along the order of 10
microseconds. It is caused by electrical transients such as voltage
spikes, electric motors turning on, and lightning or switching
equipment that bleed over to the cable.
Noise typically caused by discrete frequencies picked up by the
cable plant from radio broadcasts or an improperly grounded or
shielded home appliance such as a hair dryer. Ingress is the major
source of cable system noise.
A worldwide collection of interconnected networks using TCP/IP .
A collection of interconnected networks allowing communication
between all devices connected to any network in the collection.
Internet Protocol is a set of standards that enable different types
of computers to communicate with one another and exchange
data through the Internet. IP provides the appearance of a single,
seamless communication system and makes the Internet a virtual
network.
A unique 32-bit value that identifies each host on a TCP/IP
network. TCP/IP networks route messages based on the
destination IP address. An IP address has two parts:
•
A network address assigned by IANA
•
SVG2500 network administrator assigns a host address to
each host connected to the SVG2500, automatically using
its DHCP server as a static IP address.
For a Class C network, the first 24 bits are the network address
and the final 8 bits are the host address; in dotted-decimal format,
the IP address appears as "network.network.network.host. "
If you enable the SVG2500 DHCP client on the Basic DHCP Page,
the Internet Service provider automatically assigns the network
address, subnet mask, domain name, and DNS server to provide
a continuous Internet connection.
The Internet Protocol Security protocols are IETF authentication
and encryption standards for secure packet exchange over the
Internet. IPSec works at OSI layer 3 and secures everything on
the network.
Internet Key Exchange
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