| SNA Terminology | ||||
| Abbrev. | Expansion | Definition | ||
| APPC | Advanced Program-to-Program | An SNA protocol that's used to communicate between peer-to-peer systems. | ||
| Communications | ||||
| APPN | Advanced Peer-to-Peer Networking | An IBM Network architecture that allows computers to communicate as peers . | ||
| FDDI | Fiber Distributed Data Interface | A high speed type of network connection that uses optical fiber cabling. | ||
| ISDN | Integrated Services Digital Network | A switched digital connection that can be used for high speed remote connections. | ||
| LEN | Low Entry Networking | A PU 2.1 APPN node that can use the routing services provided by another APPN node. | ||
| LU | Logical Unit | An SNA component that provides system access. | ||
| LU 0 | Logical Unit protocol that is used in banking environments. | |||
| LU 1 | Logical Unit that is used for multi-device SNA data stream printers. | |||
| LU 2 | Logical Unit that is used for 3270 display devices. | |||
| LU 3 | Logical Unit that is used for single-device 3270 data stream printers. | |||
| LU 6.2 | Logical Unit that is used for peer-to-peer communications. | |||
| PU | Physical Unit | An SNA component that designates the type of device. | ||
| PU 2.0 | An SNA device that communicates to a host system as a peripheral node. | |||
| PU 2.1 | An SNA device that is an extension of the PU 2.0 node support. A PU 2.1 node | |||
| communicates as a peer system. | ||||
| SAA | Systems Application Architecture | An IBM standard that described standard system access methods. | ||
| SDLC | Synchronous Data Link Control | An SNA protocol that is used for remote connections between IBM mainframe and | ||
| midrange computers. | ||||
| SNA | Systems Network Architecture | A suite of communications protocols that is used for communications to IBM mainframe | ||
| and midrange computers. | ||||
| Shared | A feature of CA/400 that allows PC to use an AS/400's disk storage. | |||
| Twinaxial | A cable type used for direct connections to the AS/400. | |||
| 3270 | A type of display device that is usually used to connect to an IBM mainframe. | |||
| 5250 | A type of display device that is used to connect to an IBM midrange computer. | |||
| 802.2 | IEEE standard data link protocol that is used for Ethernet and Token-Ring networks. | |||
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