ZyXEL Communications Prestige 643 User Manual page 178

Prestige 643 ADSL Router
Host
IANA
ICMP
IGMP
Internet
Internet
Intranet
IP
IP Multicast
IP Policy Routing
(IPPR)
IPCP (PPP)
ISP
T
number of gateways that separate the source and destination.
Any computer on a network that is a repository for services available to other
computers on the network. It is quite common to have one host machine provide
several services, such as WWW and USENET.
Internet Assigned Number Authority acts as the clearinghouse to assign and
coordinate the use of numerous Internet protocol parameters such as Internet
addresses, domain names, protocol numbers, and more. The IANA Web site is at
http://www.isi.edu/iana.
Internet Control Message Protocol is a message control and error-reporting protocol
between a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP)
datagrams, but the messages are processed by the TCP/IP software and are not
directly apparent to the application user.
IGMP (Internet Group Management Protocol) is a session-layer protocol used to
establish membership in a multicast group – it is not used to carry user data.
(Lower case i) Any time you connect two or more networks together, you have an
internet.
(Upper case I) The vast collection of inter-connected networks that all use the
TCP/IP protocols and that evolved from the ARPANET of the late 60's and early
70's.
A private network inside a company or organization that uses the same kinds of
software that you would find on the public Internet, but that is only for internal use.
Internet Protocol (currently IP version 4, or IPv4), is the underlying protocol for
routing packets on the Internet and other TCP/IP-based networks.
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1
sender to 1 recipient) or Broadcast (1 sender to everybody on the network). IP
Multicast is a third way to deliver IP packets to a group of hosts on the network - not
everybody.
IPPR provides a mechanism to override the default routing behavior and alter the
packet forwarding based on the policy defined by the network administrator. Policy-
based routing is applied to incoming packets on a per interface basis prior to the
normal routing.
IP Control Protocol allows changes to IP parameters such as the IP address.
Internet Service Provider: an organization offering and providing Internet services to
Glossary