Ethernet Support Guide (for HP-UX 11i v1, 11i v2)

Glossary
Glossary
105
R
RJ-45: The name for the connector type used with
UTP cabling.
S
SNMP: Simple Network Management Protocol. A
widely used network monitoring and control
protocol. It uses devices or software processes called
SNMP agents to return information about network
devices. The information is collected into a MIB
(Management Information Base).
Subnetwork: Small discrete physical networks
connected via gateways which share the same
network address space. See Installing and
Administering LAN Software for detailed
information about subnetworks and subnet
addressing.Simple Network Management Protocol)
A widely used network monitoring and control
protocol. Data are passed from SNMP agents, which
are hardware and/or software processes reporting
activity in each network device (hub, router, bridge,
etc.) to the workstation console used to oversee the
network. The agents return information contained
in a MIB (Management Information Base),
Subnet Mask: A 32-bit mask which, when AND'd
with an internet address, determines a subnetwork
address. When the internet address is AND'd with
the subnet mask, the ones in the host portion of the
subnet mask will “overwrite” the corresponding bits
of the host portion of the internet address, resulting
in the subnet address. See Installing and
Administering LAN Software for detailed
information about subnet masks.
Switch: A network interconnection device that
allows multiple connected senders and receivers to
communicate simultaneously in contrast to a hub
(repeater) where only one device can send at a time.
Some switches have fixed port speeds (10 or 100
Mbit/s) while others allow port speeds to be
configured or autonegotiated.
T
TCP Segmentation Offload (TSO) is a
mechanism by which the host stack offloads certain
portions of outbound TCP packet processing to the
Network Interface Card (NIC) thereby reducing host
CPU utilization.
Topology: The physical and logical geometry
governing placement of nodes in a computer
network. Also, the layout of the transmission
medium for a network.
U
Unshielded Twisted Pair: A data cable type
consisting of pairs of wires twisted together without
an electrically shielding jacket.
UTP: See Unshielded Twisted Pair
V
VLAN: Virtual LAN. VLANs are a mechanism to
determine which end stations should receive
broadcast traffic, since it should not be sent
arbitrarily to every connected user. Each packet
transmitted by an end-station is assigned to a
VLAN. An end-station only receives all the multicast
and broadcast traffic on the LANs to which it
belongs, and an end-station receives unicast traffic
addressed to it on the VLAN to which it belongs.