ZyXEL Communications Prestige 642M series, User Manual

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Prestige 642M Series ADSL Bridge
Glossary C
Flash memory
The nonvolatile storage device that can be electrically erased and reprogrammed so that data can
be stored, booted and rewritten as necessary.
Gateway
A gateway is a computer system or other device that acts as a translator between two systems
that do not use the same communication protocols, data formatting structures, languages, and/or
architecture.
Host
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.
IANA
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. Use a search engine to find the current IANA web site.
ICMP
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.
Internet
(Lower case “i”"). Any time you connect two or more networks together, you have an internet.
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. The Internet now
(July 1995) connects roughly 60,000 independent networks into a vast global Internet.
Intranet
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.
IP
Internet Protocol. (Currently IP version 4 or IPv4). The underlying protocol for routing packets
on the Internet and other TCP/IP-based networks.
IPCP (PPP)
IP Control Protocol allows changes to IP parameters such as the IP address.
IPX
Internetwork Packet eXchange. The native NetWare internetworking protocol is IPX
(Internetwork Packet Exchange). Like IP (Internet Protocol), IPX is an internetworking protocol
that provides datagram services.
ISP
Internet Service Providers provide connections into the Internet for home users and businesses.
There are local, regional, national, and global ISPs. You can think of local ISPs as the
gatekeepers into the Internet.
LAN
Local Area Network is a shared communication system to which many computers are attached.
A LAN, as its name implies, is limited to a local area. This has to do more with the electrical
characteristics of the medium than the fact that many early LANs were designed for
departments, although the latter accurately describes a LAN as well. LANs have different
topologies, the most common being the linear bus and the star configuration.
MAC
On a local area network (LAN) or other network, the MAC (Media Access Control) address is a
computer's unique hardware number. (On an Ethernet LAN, it's the same as your Ethernet
address). The MAC layer frames data for transmission over the network, then passes the frame
to the physical layer interface where it is transmitted as a stream of bits.