Expand Configuration and Management Manual (H06.03+)

Glossary
Expand Configuration and Management Manual—529522-002
Glossary-8
Input/Output adapter module (IOAM)
Input/Output adapter module (IOAM). A product that allows the HP NonStop™ NS-series
server to communicate with fiber-channel or Ethernet products. The IOAM is a rack-
mountable enclosure that contains two ServerNet Switch Boards and up to 5 Fibre-
Channel ServerNet adapters (FCSAs) or Gigabit Ethernet 4-port ServerNet adapters
(G4SAs). Up to 5 G4SAs, FCSAs, or any combination can be added per IOAM module,
for a total of 10 adapters per IOAM enclosure.
input/output process (IOP). A running program (part of the operating system) that
manages the I/O functions for one or more ServerNet addressable controllers (SACs)
of the same type.
Internet Protocol (IP). The Internet standard protocol that defines the Internet datagram as
the unit of information passed across the Internet and that provides the basis for the
Internet connectionless, best-effort packet-delivery service.
Internet Protocol (IP) address. A 4-octet (32-bit) numeric value identifying a particular
network (network address portion) and a local host on that network (local address
portion). See also port number.
IOAM. See Input/Output adapter module (IOAM).
IOP. See input/output process (IOP).
IP. See Internet Protocol (IP).
IP address. An address that identifies a specific host to the Internet Protocol (IP). An IP
address consists of two parts: a network address, which identifies the network, and a
local address, which identifies a host within a network. A network address is
concatenated with a host address to form the IP address and uniquely identify a host
within a network. IP routes data between source and destination IP addresses.
Kernel subsystem manager process. A generic process named $ZZKRN that starts and
manages other generic processes, some system attributes, and the ServerNet X- and
Y-fabrics.
Layer 2. A term that is used to refer to the Data Link Layer of the Open Systems
Interconnection (OSI) Reference Model. Layer 2 defines rules for transmission on the
physical medium. Direct-connect and satellite-connect Expand line-handler processes
provide the High-level Data Link (HDLC) protocol at Layer 2. Expand-over-NAM line-
handler processes use the Layer 2 services provided by either the SNAX/APN or
X25AM subsystems. Expand-over-ServerNet line-handler processes use the Layer 2
services provided by the ServerNet monitor process, $ZZSCL. Expand-over-IP line-
handler processes use the Layer 2 services provided by NETIP protocol. Expand-over-
ATM line-handler processes use the Layer 2 services provided by the NETATM
protocol. The Expand line-handler process’s Data Link Layer, or line functions,
corresponds to the LINE object referred to by the Expand Subsystem Control Facility
(SCF) interface.