NETGEAR Cable/DSL ProSafe Firewall FR328S - Manual (Page 127)

FR328S ProSafe Firewall with Dial Back-Up Reference Manual v2
Glossary 3
M-10207-01, Reference Manual v2
(known as the upstream rate). ADSL requires a special ADSL modem. ADSL is growing in popularity as
more areas around the world gain access.
DSLAM
DSL Access Multiplexor. The piece of equipment at the telephone company central office that provides the
ADSL signal.
Dynamic Host Configuration Protocol
DHCP. An Ethernet protocol specifying how a centralized DHCP server can assign network configuration
information to multiple DHCP clients. The assigned information includes IP addresses, DNS addresses, and
gateway (router) addresses.
Ethernet
A LAN specification developed jointly by Xerox, Intel and Digital Equipment Corporation. Ethernet
networks transmit packets at a rate of 10 Mbps.
Gateway
A local device, usually a router, that connects hosts on a local network to other networks.
ICMP
See “Internet Control Message Protocol”
IEEE
Institute of Electrical and Electronics Engineers. This American organization was founded in 1963 and sets
standards for computers and communications.
IETF
Internet Engineering Task Force. An organization responsible for providing engineering solutions for TCP/
IP networks. In the network management area, this group is responsible for the development of the SNMP
protocol.
Internet Control Message Protocol
ICMP is an extension to the Internet Protocol (IP) that supports packets containing error, control, and
informational messages. The PING command, for example, uses ICMP to test an Internet connection.
Internet Protocol
The method or protocol by which data is sent from one computer to another on the Internet. Each computer
(known as a host) on the Internet has at least one IP address that uniquely identifies it among all other
computers on the Internet. When you send or receive data (for example, an e-mail note or a Web page), the
message gets divided into little chunks called packets. Each of these packets contains both the sender's
Internet address and the receiver's address. Any packet is sent first to a gateway computer that understands a
small part of the Internet. The gateway computer reads the destination address and forwards the packet to an
adjacent gateway that in turn reads the destination address and so forth across the Internet until one gateway