Siemens HiPath C10 User Manual page 278

hwc_glossary.fm
Glossary
Networking terms and abbreviations
Term
OS
OSI
OSI Layer 2
OSI Layer 3
OSPF
OUI
Table 19
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HiPath Wireless Controller, Access Points and Convergence Software V4.0, C10/C100/C1000 User Guide
Explanation
Operating system.
Open System Interconnection. An ISO standard for worldwide
communications that defines a networking framework for
implementing protocols in seven layers. Control is passed from one
layer to the next, starting at the application layer in one station, down
through the presentation, session, transport, network, data link layer
to the physical layer at the bottom, over the channel to the next station
and back up the hierarchy.
At the Data Link layer (OSI Layer 2), data packets are encoded and
decoded into bits. The data link layer has two sublayers:
the Logical Link Control (LLC) layer controls frame
●
synchronization, flow control and error checking
The Media Access Control (MAC) layer controls how a computer
●
on the network gains access to the data and permission to
transmit it.
The Network layer (OSI Layer 3) provides switching and routing
technologies, creating logical paths, known as virtual circuits, for
transmitting data from node to node. Routing and forwarding are
functions of this layer, as well as addressing, internetworking, error
handling, congestion control and packet sequencing.
Open Shortest Path First, an interior gateway routing protocol
developed for IP networks based on the shortest path first or link-state
algorithm. Routers use link-state algorithms to send routing
information to all nodes in an internetwork by calculating the shortest
path to each node based on a topography of the Internet constructed
by each node. Each router sends that portion of the routing table
(keeps track of routes to particular network destinations) that
describes the state of its own links, and it also sends the complete
routing structure (topography). Using OSPF, a host that obtains a
change to a routing table or detects a change in the network
immediately multicasts the information to all other hosts in the network
so that all will have the same routing table information. The host using
OSPF sends only the part that has changed, and only when a change
has taken place. (RFC2328)
Organizationally Unique Identifier (used in MAC addressing).
A31003-W1040-U101-1-7619, July 2006 DRAFT