User Guide

Table Of Contents
XII
ES520 Bridge: Glossary
IPsec
Internet Protocol security—a set of protocols developed by the IETF to support secure
exchange of packets at the IP layer, deployed widely to implement VPNs.
IPv4
Internet Protocol version 4—the first widely implemented and still the most prevalent
version of IP.
IPv6
Internet Protocol version 6—the next version of IP slated for wide implementation,
intended to overcome the limitations of, and to eventually replace, IPv4.
ISO
International Organization for Standardization, formerly the International Standards
Organization—ISO still refers to standards (ex., ISO 9000); the whole name refers to
the organization, sometimes appending the earlier initialization in parentheses.
isotropic antenna
A theoretical, idealized antenna that would transmit power uniformly in all directions;
used to measure antenna gain in dBi.
IT Information Technology
ITU-T
International Telecommunications Union-Telecommunication, Geneva-based interna-
tional organization for telecommunications standards, formerly CCITT.
key establishment
An transaction through which two parties with no prior knowledge of one another can
agree upon a shared secret key for symmetric key encryption of data over an insecure
channel. Sometimes, key exchange.
LAN
Local Area Network—a collection of computers located within a small area (such as an
office building) that shares a common communications infrastructure and network
resources (i.e., printers, servers, etc.).
Layer 2 Refer to DLC.
LDAP
Lightweight Directory Access Protocol—a protocol used to access directories on a net-
work, including the Internet. LDAP makes it possible to search compliant directories to
locate information and resources on a network. LDAP is a streamlined version of the
Directory Access Protocol, part of the X.500 standard for network directory services.
LLC
Logical Link Control—one of two sublayers of OSI Layer 2 (refer to
DLC
), in which frame
synchronization, flow control and error checking takes place.
MAC
Media Access Control—one of two sublayers of the OSI Model’s DLC, at which data
access and transmission permissions are controlled.
MAC address
Media Access Control address—a unique number that identifies a device, used to prop-
erly direct network traffic to the device.
MAN
Metropolitan Area Network—a collection of interconnected computers within a town or
city.
MBG
Mesh Border Gateway—in Fortress Secure Wireless Bridges, an MP that connects the
FastPath Mesh network to a conventional hierarchical network.
MIB
Management Information Base—SNMP-compliant information that an SNMP agent
stores about itself and sends in response to SNMP server requests (PDUs).
MITM
Man in the Middle attack—a network security breach in which an attacker is able to
intercept, read, insert and modify messages between two parties without their knowing
that the link between them has been compromised.
MLD
Multicast Listener Discovery—a means, defined in the IPv6 ICMPv6 protocol, of discov-
ering multicast listeners on a directly attached link (analogous to IGMP in IPv4).
MobileLink
In GE Medical Systems
Information Technologies
, a proprietary method for wireless
transmission of serial output.
MP
Mesh Point—in Fortress Secure Wireless Bridges, a Bridge on which FastPath Mesh rout-
ing is enabled.
MRD
Multicast Router Discovery—a mechanism, defined in IETF RFC 4286, for identifying
multicast routers independent of the multicast routing protocol they use.