NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-120
Transmission Control Protocol (TCP)
Transmission Control Protocol (TCP). A connection-oriented protocol that provides for the
reliable exchange of data between a sending and a receiving system. TCP implements
functions corresponding to the Open Systems Interconnection (OSI) reference model
Layer 4, the transport layer.
Transmission Control Protocol/Internet Protocol (TCP/IP). A set of layered
communication protocols for connecting workstations and larger systems in both local
area networks (LANs) and wide area networks (WANs). See also HP NonStop™
TCP/IP and Parallel Library TCP/IP.
tri-star topology. A network topology that uses up to three HP NonStop™ Cluster Switches
for each external fabric. External routing is implemented between the three star groups
of a ServerNet cluster. (A star group consists of the eight nodes attached to one set of
cluster switches.) The star groups are joined by two-lane links. Introduced with the
G06.14 release version update (RVU), the tri-star topology supports up to 24 nodes.
See also split-star topology, star topology, and layered topology.
Trivial File Transfer Protocol (TFTP). A protocol defined by Request for Comments (RFC)
1350. TFTP is used as a data link control (DLC) and diagnostic task.
TRSA. See Token-Ring ServerNet adapter (TRSA).
TSM. See Compaq TSM.
TSM client software. See Compaq TSM client software.
TSM Event Viewer. See Compaq TSM Event Viewer.
TSM Low-Level Link. See Compaq TSM Low-Level Link.
TSM Notification Director. See Compaq TSM Notification Director.
TSM package. See Compaq TSM package.
TSM server software. See Compaq TSM server software.
TSM Service Application. See Compaq TSM Service Application.
two-lane link. The two single-mode fiber-optic (SMF) ServerNet cables that connect the HP
NonStop™ Cluster Switches on the same external fabric (for example, X1, X2, and X3)
in a tri-star topology.
u. Unit of height for a standard rack; 1.75 inches.
UCME. See uncorrectable memory error (UCME).
UID. A nonnegative integer that uniquely identifies a user within a node.