Trend Micro VirusWall 2500 Administrator'S Manual Download

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G–3

PING command, for example, uses ICMP to test
an Internet connection.

IP multicasting

Sending out data to distributed servers on the
MBone. For large amounts of data, IP Multicast
is more efficient than normal Internet transmis-
sions because the server can broadcast a mes-
sage to many recipients simultaneously. Unlike
traditional Internet traffic, which requires sepa-
rate connections for each source-destination
pair, IP Multicasting allows many recipients to
share the same source, transmitting just one set
of packets for all the destinations.

IPsec

Short for IP Security, a set of protocols devel-
oped by the IETF to support secure exchange of
packets at the IP layer. IPsec is a widely used
method of implementing Virtual Private Net-
works (VPNs).

L2 devices

Short for layer 2 devices. These devices refer to
hardware devices connected to the Data Link
layer of the OSI model. Switches are examples
of L2 devices.

L3 devices

Short for layer 3 devices. These devices refer to
hardware devices connected to the Network
layer of the OSI model. Routers are examples of
L3 devices.

L2TP

Short for Layer Two (2) Tunneling Protocol, an
extension to the PPP protocol that enables ISPs
to operate Virtual Private Networks (VPNs).

LAN

Short for local area network. A computer net-
work that spans a relatively small area. Most
LANs reside in a single building or a group of
buildings.

LCD module

See LCM console.

LCD

Short for Liquid Crystal Display. A 5x7 dot dis-

play LCD on the Network VirusWall Enforcer
2500 front panel that is capable if displaying
2x16 character messages.

LCM console

Also referred to as the LCD module. It is com-
posed of the LCD and Control Panel, which is
located on the Network VirusWall Enforcer 2500
front panel. This allows basic Network VirusWall
Enforcer 2500 device settings configuration. See

Table 1-1, “Comparison of the Network
VirusWall Enforcer 2500 management tools,” on
page 9

Managed product

Refers to any software or hardware application
managed by a Control Manager server.

Management console

Short for Control Manager management con-
sole. A Web-based console published via IIS
from the Control Manager server, which admin-
istrators use to administer managed products
and devices registered to Control Manager.

Management device

The device that you log in to when you want to
change the configuration of devices in a failover
pair. This device sends replicates the configura-
tion to the other device in the failover pair. The
default Management device is the Primary
device.

MBone

Short for Multicast Backbone. MBone is an
extension to the Internet to support IP multicast-
ing -- two-way transmission of data between
multiple sites.

Mesh network

A mesh network is a network that employs one
of two connection arrangements: full mesh topol-
ogy or partial mesh topology. In the full mesh
topology, each node connects directly to each of
the others. In the partial mesh topology, nodes e
connect to only some, not all, of the other nodes.

MIB

Management Information Base (MIB). Groups
the SNMP information organized in the form of

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