riber's equipment to the network.
- See data link level.
- In SNA, the combination of the transmission connection, protocol, devices, and programming joining network nodes.
link level 2 test
See link test.
The list of libraries searched by the control program (after the job pack, task library, step library, job library, and link pack area have been searched) for any load that does not provide a specific data control block to be used. In MVS, the system name is LNKLST.
link pack area (LPA)
The portion of virtual storage below 16 MB that contains frequently used modules. See also dynamic link pack area.
A state that indicates a datalink field contains one or more values that cannot be validated due to a system failure, communications failure, or other similar error. The file is still usable when it is in this state, but only for reading data.
Link Problem Determination Aid (LPDA)
A series of procedures used by products to test modem or other data circuit-terminating equipment (DCE) operations, and to provide information about the DCE and the data link. An extended version also provides operational and configuration commands. LPDA commands can be used only with DCEs that support LPDA.
Link Problem Determination Aid-2 (LPDA-2)
A second version of the LPDA command set. In addition to most of the functions of LPDA-1, LPDA-2 also supports modem configuration commands, a call out (dial) command, a set transmit speed command, and commands to operate a contact that controls external devices.
The rules for sending and receiving data at the link level. See also protocol.
link protocol converter (LPC)
A device that changes one type of link-level protocol information to another type of link-level protocol information for processing; for example, 5208 Link Protocol Converter, 5209 Link Protocol Converter, or ROLMbridge 5250 Link Protocol Converter.
A required component of a reconciliation task that is used to link instances from two data sets based on one or more common attributes. See also comparison rule, reconciliation task, task filter.
A limit on one system's authorization to attach transactions and access resources in another. Link security works by signing on each end of a session (to RACF, in CICS Transaction Server) when the session is bound. Each half-session then has the access requirements of the single user profile defined for the remote system as a whole. This profile is applied when a transaction is attached and whenever the transaction accesses a protected resource. See also session security.
link semantic type
A semantic type that can be assigned only to a link or a link type. See also semantic type.
In routing protocols, the advertised information about the usable interfaces and reachable neighbors of a router or network. The protocol's topological database is formed from the collected link-state advertisements.
link-state advertisement (LSA)
In a link-state routing protocol, a packet that contains information about neighbors and path costs. Each router in an area generates its link-state database from the link-state advertisements (LSAs) that it receives from all the other routers in the same area and the LSAs that itself generates.
In a link-state routing protocol, a database that each router in an area generates from the link-state advertisements (LSAs) that it receives from all the other routers in the same area and the LSAs that itself generates. Based on the link-state database, each router calculates the shortest-path spanning tree, with itself as the root, using the Shortest Path First (SPF) algorithm.
link-state routing protocol
A type of routing protocol in which each router uses the Shortest Path First (SPF) algorithm to calculate shortest (lowest-cost) paths, and broadcasts or multicasts information regarding the cost of reaching each of its neighbors to all nodes in the internetwork. See also distance-vector routing protocol, Shortest Path First.
- In VTAM, a named resource within an APPN or a subarea node that represents the connection to another APPN or subarea node that is attached by an APPN or a suba