index_O

O

OAN (Optical Access Network) 70

OMI (Open Messaging Interface), 400401

Optical Networks, 2832

OS/2 LANs, 370375

OSG (Open Systems Group), 519520

OSI (Open System Interconnection) model

connection types, 8

description of, 48

history of, 10

IPC and, 374376

physical layer, 910

transport protocols, 1113

X.400 standard, 260263, 400

OSPF (Open Shortest Path First) protocol, 453454, 457