Trend Micro™ Network VirusWall™ Enforcer 2500 Administrator’s Guide
G–2
to the memory chips whereas a DIMM has 64-bit
path. Because the Pentium processor requires a
64-bit path to memory, you need to install
SIMMs two at a time. With DIMMs, you can
install memory one DIMM at a time.
Directory Manager
Allows you to customize the Product Directory
organization to suit your administration model
needs.
Ethernet
One of the most widely implemented local-area
network (LAN) architecture developed by Xerox
Corporation in cooperation with DEC and Intel in
1976. Ethernet uses a bus or star topology and
supports data transfer rates of 10Mbps,
100Mbps (100Base-T or Fast Ethernet), or
1,000Mbps or 1Gbps.
Failopen
A fault-tolerance solution allows the Network
VirusWall Enforcer 2500 device to continue to
pass traffic in an event when a software or hard-
ware failure occurs within the device.
Failover
A backup operational mode in which a standby
device assumes the functions of a NVW device
when the Active device becomes unavailable
through either failure or scheduled down time.
Fault tolerance
The ability of a system to respond gracefully to
an unexpected hardware or software failure.
HA
High availability
Refers to the ability of a Network VirusWall
Enforcer 2500 device to be continuously opera-
tional for a desirably long length of time. Admin-
istrators usually measure availability relative to
"100% operational" or "never failing."
IETF
Short for Internet Engineering Task Force, the
main standards organization for the Internet.
The IETF is a large open international commu-
nity of network designers, operators, vendors,
and researchers concerned with the evolution of
the Internet architecture and the smooth opera-
tion of the Internet. It is open to any interested
individual.
IGMP
Short for Internet Group Management Protocol.
It is the standard protocol for IP multicasting in
the Internet.
The purpose of IGMP is to establish host mem-
berships in particular multicast groups on a sin-
gle network. Its mechanism allows a host to
inform its local router, using Host Membership
Reports, that it wants to receive messages
addressed to a specific multicast group.
Image
Refers to the Network VirusWall Enforcer 2500
firmware or program file.
Intelligent Platform Management Interface
Short for IPMI. IPMI is an interface or gateway
between the host system (that is, server man-
agement software) and the periphery devices.
Internal port
Also referred to as INT. The Network VirusWall
Enforcer 2500 port/interface that connects to the
network.
Internet Control Message Protocol
Short for Internet Control Message Protocol, an
extension to the Internet Protocol (IP) defined by
RFC 792. ICMP supports packets containing
error, control, and informational messages. The
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