Motorola SVG2500 manual Ike

17 GLOSSARY
TERM	DEFINITION
IGMP spoofing	A process where a router acts as an IGMP querier for multicast
	hosts and an IGMP host to a multicast router.
impedance	The total opposition to AC electron current flow within a device.
	Impedance is typically 75 ohms for coax cable and other CATV
	components.
impulse noise	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.
Ingress noise	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.
Internet	A worldwide collection of interconnected networks using TCP/IP.
Internetwork	A collection of interconnected networks allowing communication
	between all devices connected to any network in the collection.
IP	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.
IP address	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.
IPSec	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.
IKE	Internet Key Exchange
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