Internal Protocol Television uses a digital signal sent via broadband through a switched telephone or
cable system. An accompanying set top box (that sits on top of the TV) decodes the video and converts
it to standard television signals.
IVL
In Independent VLAN Learning, every VLAN uses its own logical source address table, as opposed to
SVL (Shared VLAN Learning), where two or more VLANs share the same part of the MAC address table.
LACP
Link Aggregation Control Protocol is part of the IEEE 802.3ad and automatically configures multiple
aggregated links between switches.
LAG
A Link Aggregation Group is the logical high-bandwidth link that results from grouping multiple
network links in link aggregation (or load sharing). You can configure static LAGs or dynamic LAGs
(using the LACP (Link Aggregation Control Protocol)).
LLC
The IEEE 802.2 Logical Link Control protocol provides a link mechanism for upper layer protocols. It is
the upper sub-layer of the Data Link Layer and provides multiplexing mechanisms that make it possible
for several network protocols (IP, IPX) to coexist within a multipoint network. The LLC header consists of
a 1 byte Destination Service Access Point (DSAP), 1 byte Source Service Access Point (SSAP), and a 1 or
2 byte Control field, followed by LLC information.
LLDP
Link Layer Discovery Protocol conforms to IEEE 802.1ab and is a neighbor discovery protocol. Each
LLDP-enabled device transmits information to its neighbors, including chassis and port identification,
system name and description, VLAN (Virtual LAN) names, and other selected networking information.
The protocol also specifies timing intervals in order to ensure current information is being transmitted
and received.
load sharing
Load sharing, also known as trunking or link aggregation, conforms to IEEE 802.3ad. This feature is the
grouping of multiple network links into one logical high-bandwidth link. For example, by grouping four
100 Mbps of full-duplex bandwidth into one logical link, you can create up to 800 Mbps of bandwidth.
Thus, you increase bandwidth and availability by using a group of ports to carry trac in parallel
between switches.
LSA
A Link State Advertisement is a broadcast packet used by link state protocols, such as OSPF (Open
Shortest Path First). The LSA contains information about neighbors and path costs and is used by the
receiving router to maintain a routing table.
MAC
Media Access Control layer. One of two sublayers that make up the Data Link Layer of the OSI model.
The MAC layer is responsible for moving data packets to and from one NIC to another across a shared
channel.
MD5
Glossary
ISW Series Managed Industrial Ethernet Switch Command Reference Guide 159
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