Motorola SURFBOARD SVG2500 - Manual (Page 161)

17 GLOSSARY
146
TERM DEFINITION
On an HFC network, a hub is a scaled-down headend that
performs some or all headend functions for part of the system.
Hz Hertz — one cycle per second. The unit to measure the frequency
that an alternating electromagnetic signal cycles through its
highest and lowest states. Used to define the bands of the
electromagnetic spectrum used in voice and data
communications, or to define the bandwidth of a transmission
medium.
I
TERM DEFINITION
IANA The Internet Numbering Address Authority (IANA) is an
organization under the Internet Architecture Board (IAB) of the
Internet Society that oversees IP address allocation. It is under a
contract from the U.S. government.
ICMP Internet Control Message Protocol is a protocol used for error,
problem, and informational messages sent between IP hosts and
gateways. ICMP messages are processed by the IP software and
are not usually apparent to the end-user.
ICSA The International Computer Security Association is the security
industry’s main source of research, intelligence, and product
certification.
IEEE The Institute of Electrical and Electronics Engineers, Inc.
(http://www.ieee.org) is an organization that produces standards,
technical papers, and symposiums for the electrical and electronic
industries and is accredited by ANSI.
IEEE 802.11b
IEEE 802.11g IEEE wireless network standards
IEEE 802.3 See Ethernet.
IETF The Internet Engineering Task Force (http://www.ietf.org) is an
open international community of network designers, operators,
vendors, and researchers that develops and maintains Internet
architecture. Technical working groups issue working documents
called Internet-Drafts. The IETF publishes review versions of the
drafts called requests for comments (RFCs).
IGMP Internet Group Membership Protocol is the Internet multicasting
standard. IGMP establishes and maintains a database of group
multicast addresses and interfaces to which a multicast router
forwards multicast packets. IGMP runs between multicast hosts
and their immediately-neighboring multicast routers.