TCP/IPv6 Migration Guide

Glossary
HP NonStop TCP/IPv6 Migration Guide—524524-004
Glossary-14
MFIOB
MFIOB. See multifunction I/O board (MFIOB).
MILNET (Military Network). Originally part of the ARPANET, MILNET was partitioned in
1984 to make it possible for military installations to have reliable network service, while
the ARPANET continues to be used for research. MILNET uses exactly the same
hardware and protocol technology as ARPANET, and there are several interconnection
points between the two. Thus, under normal circumstances, MILNET sites are part of
the Internet.
multicast. A technique that allows copies of a single packet to be passed to a selected
subset of all possible destinations. Some hardware (for example, Ethernet) supports
multicast by allowing a network interface to belong to one or more multicast groups.
Broadcast is a special form of multicast in which the subset of machines selected to
receive a copy of a packet consists of the entire set.
multicast address. An identifier for a set of interfaces (typically belonging to different
nodes). A packet sent to a multicast address is delivered to all interfaces identified by
that address.
multifunction I/O board (MFIOB). A ServerNet adapter that contains ServerNet
addressable controllers (SACs) for SCSI and Ethernet; a service processor; ServerNet
links to the processor, to the two ServerNet adapter slots, and to one of the ServerNet
expansion board (SEB) slots; and provides connections to the serial maintenance bus
(SMB), which connects components within an enclosure to the service processor.
neighbor. A node that is attached to the same link.
NFS (Network File System). A protocol developed by SUN Microsystems that uses IP to
allow a set of cooperating computers to access each other's file systems as if they
were local. The key advantage of NFS over conventional file transfer protocols is that
NFS hides the differences between local and remote files by placing them in the same
name space. NFS is used primarily on UNIX systems, but has been implemented for
many systems, including personal computers like an IBM PC and Apple Macintosh.
noncritical event. A DSM event not too crucial to system or network operations. Each
subsystem determines which of its events are noncritical by setting the value of the
emphasis token to FALSE. Compare critical event.
nonsensitive command. A DSM command that can be issued by any user or program
allowed access to the target subsystem—that is, a command on which the subsystem
imposes no further security restrictions. For HP data communications subsystems, the
nonsensitive commands are all those that cannot change the state or configuration of
objects (usually information commands). Compare sensitive command.
nowait mode. In Guardian file-system operations and in some APS operations, the mode in
which the called procedure initiates an I/O operation but does not wait for it to complete
before returning control to the caller. In order to make the called procedure wait for the
completion of the operation, the application calls a separate procedure. Compare wait
mode.