Standard used in France and Russia.
SDU (Service Data Unit). Data as it appears at the interface between a layer and the layer immediately above.
segment. A single ATM link or group of interconnected ATM links of an ATM connection.
signaling virtual channel. A virtual channel for transporting signaling information.
SLIP (Serial Line IP). An IETF Standard for running IP over serial line communication links.
SNA (System Network Architecture). A networking architecture developed by IBM currently used for large systems.
SNAP (SubNetwork Attachment Point). An LLC header extension that identifies the protocol type of a frame.
SNMP (Simple Network Management Protocol). An IETF Standard protocol that uses MIBs to control and monitor network elements.
SR (Source Routing). A bridging protocol for
SRT (Source Routing Transparent). A bridging protocol for LANs specified in the IEEE 802.1d Standard. SRT bridges support both
Sublayer. A logical
switched connection. A connection established by signaling.
SVC (switched virtual circuit). A logical (not physical) connection established between two ATM stations on demand using signalling.
SVN (Switched Virtual Networking). The name of IBM′ s framework for building and managing
synchronous. Literally ªlocked togetherº. When two bit streams are said to be synchronous it is meant that they are controlled by the same clock and are in the same phase.
This soft copy for use by IBM employees only.
T
TB (Transparent bridging). A bridging protocol for LANs specified in the IEEE 802.1d Standard.
TLV (Type/length/value). A generalized information element that may be present in certain LAN emulation packets.
telephone twisted pair. One or more twisted pairs of copper wire in the unshielded
U
UBR (Unspecified Bit Rate). ATM Forum Service category in relation to traffic Management on ATM networks. The UBR service is for ″best effort″ delivery of data.
UTP (unshielded twisted pair). See telephone
twisted pair.
UNI (User to Network Interface). The connection that links a user device to an ATM switch, hence attaches it to the ATM network.
V
VC (Virtual Channel). A concept used to describe unidirectional transport of ATM cells associated by a common unique identifier value.
VCC (Virtual Channel Connection). A concatenation of virtual channel links that extends between two points where the adaptation layer is accessed.
VCI (Virtual Channel Identifier). The VPI/VCI pair uniquely identify a specific ATM connection on a given link.
virtual channel link. A means of unidirectional transport of ATM cells between a point where a virtual channel identifier value is assigned and the point where that value is translated or removed.
VLAN (Virtual Local Area Network). A logical collection of ATM stations grouped into a single domain, and independent of physical location. A VLAN is often based on end stations having common access to a LAN emulation server or Classical IP ARP server.
VP (Virtual Path). A concept used to describe the unidirectional transport of ATM cells belonging to virtual channels that are associated by a common identifier value.
virtual path connection. A concatenation of virtual path links that extends between the point where the
