TCP/IPv6 Configuration and Management Manual (G06.24+)

Glossary
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
Glossary-10
hierarchical routing
specified set of header tokens; event messages, a different set with some overlap. See
also SPI message.
hierarchical routing. Routing based on a hierarchical addressing scheme. Most Internet
routing is based on a two-level hierarchy in which an Internet address is divided into a
network portion and a host portion. Gateways use only the network portion until the
datagram reaches a gateway that can deliver it directly. Subnetting introduces
additional levels of hierarchical routing.
hop count. A measure of distance between two points in the Internet. A hop count of n
means that n gateways separate the source destination.
host. Any node that is not a router.
ICMP. See Interior Gateway Protocol (IGP).
IEEE. See Institute of Electrical and Electronics Engineers (IEEE).
IEEE 802.3. A local area network protocol suite commonly known as Ethernet. Ethernet has
either a 10Mbps or 100Mbps throughput and uses Carrier Sense Multiple Access bus
with Collision Detection (CSMA/CD. This method allows users to share the network
cable. However, only one station can use the cable at a time. A variety of physical
medium dependent protocols are supported.
IEE 802.5. A local area network protocol suite commonly known as token ring. A standard
originated by IBM for a token-passing ring network that can be configured in a star
topology. Versions supported are 4Mbps and 16 Mbps.
IEN. See Internet Engineering Note (IEN).
IGP. See Interior Gateway Protocol (IGP).
INET Mode. An operating mode of NonStop TCP/IPv6 in which the subsystem supports only
IPv4 addressing and provides the same functionality as Parallel Library TCP/IP. See
also INET6 Mode
and DUAL Mode.
INET6 Mode. An operating mode of NonStop TCP/IPv6 in which the subsystem supports
only IPv6 addressing. See also INET Mode and DUAL Mode.
Input/Output adapter module (IOAM). A product that allows the HP NonStop™ S-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, for a
total of 10 adapters per IOAM enclosure. There are two IOAMs per IOAM enclosure.
Interior Gateway Protocol (IGP). The generic term applied to any protocol used to
propagate network reachability and routing information within an autonomous system.
Although no standard Internet IGP exists, RIP is among the most popular.