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4
G
LOSSARY
MIB
Management Information Base. A definition of management
items for some network component that can be accessed by
network management software. A MIB includes the names
of objects it contains and the type of information retained.
Node
A device connected to the network media, usually with an
adapter card.
Point-to-point
Transmission of data between two nodes on a network where
one node is the sender and the other node is the receiver.
PVC
Permanent Virtual Circuit. An ATM mode in which the
communication circuit between two nodes on a network is
manually set up and torn down.
SAR
Segmentation and Reassembly. A procedure that breaks down
and reassembles variable-length packets from legacy LAN
(Ethernet and token ring) applications. The SAR chip set
receives protocol data units (PDUs) from the convergence
sublayer and divides them into small segments, typically
44 bytes long. Two header bytes and two trailer bytes are
added to these segments. The resulting segment is a 48-byte
PDU that fits into the payload of an ATM cell.
SDH
Synchronous Digital Hierarchy. A European body of standards
that defines all aspects of transmitting and managing digital
traffic over optical fiber.
Signaling
An ATM connection procedure that implements explicit
routes through switches to establish a communication link
with another station on the network.
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