Motorola SURFBOARD SVG2500 User Manual page 161

17 GLOSSARY
TERM
Hz
I
TERM
IANA
ICMP
ICSA
IEEE
IEEE 802.11b
IEEE 802.11g
IEEE 802.3
IETF
IGMP
DEFINITION
On an HFC network, a hub is a scaled-down headend that
performs some or all headend functions for part of the system.
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.
DEFINITION
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.
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.
The International Computer Security Association is the security
industry's main source of research, intelligence, and product
certification.
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 wireless network standards
See Ethernet.
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).
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.
146