
Glossary
Summit WM-Series WLAN Switch and Altitude Access Point Software Version 1.0 User Guide
154
L
LAN Local Area Network.
LSA Link State Advertisements received by the currently running OSPF
process. The LSAs describe the local state of a router or network,
including the state of the router's interfaces and adjacencies. See also
OSPF.
M
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 Network Interface Card (NIC) to
another across a shared channel.
MAC address Media Access Control address. A hardware address that uniquely
identifies each node of a network.
MIB Management Information Base is a formal description of a set of
network objects that can be managed using the Simple Network
Management Protocol (SNMP). The format of the MIB is defined as
part of the SNMP. A MIB is a collection of definitions defining the
properties of a managed object within a device. Every managed device
keeps a database of values for each of the definitions written in the
MIB. Definition of the MIB conforms to RFC1155 (Structure of
Management Information).
MIC Message Integrity Check or Code (MIC), also called “Michael”, is part
of WPA and TKIP. The MIC is an additional 8-byte code inserted
before the standard 4-byte integrity check value (ICV) that is
appended in by standard WEP to the 802.11 message. This greatly
increases the difficulty in carrying out forgery attacks.
Both integrity check mechanisms are calculated by the receiver and
compared against the values sent by the sender in the frame. If the
values match, there is assurance that the message has not been
tampered with. (See WPA, TKIP and ICV).
MTU Maximum Transmission Unit. The largest packet size, measured in
bytes, that a network interface is configured to accept. Any messages
larger than the MTU are divided into smaller packets before being
sent.
MU Mobile Unit, a wireless device such as a PC laptop.
multicast, broadcast,
unicast
Multicast: transmitting a single message to a select group of recipients.
Broadcast: sending a message to everyone connected to a network.
Unicast: communication over a network between a single sender and a
single receiver.
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