Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [X] [Z] OC (Optical Carrier) levels (SONET) 2nd octets OFDM offsite storage (backups) 2nd omni directional antennas 2nd one-way satellite systems open authentication operating systems conenctivity troubleshooting checklist Mac identifying optical cable testers OSI (Open Systems Interconnect) model packet-filtering firewalls OSI (Open Systems Interconnect) reference model application layer 2nd bridges, mapping to data-link layer 2nd LLC (Logical Link Control) layer MAC (Media Access Control) layer hubs, mapping to ISO network cards, mapping to network layer 2nd 3rd 4th physical layer 2nd presentation layer 2nd encryption routers, mapping to session layer 2nd switches, mapping to transport layer 2nd buffering TCP (Transmission Control Protocol) UDP (User Datagram Protocol) windowing WAP (wireless access points), mapping to OSI (Open Systems Interconnect) reference model (ISO) transport layer TCP (Transmission Control Protocol) OSPF (Open Shortest Path First) TCP/IP protocol suite 2nd OSPF (Open Shortest Path First) link state routing protocol OTDR (optical time-domain reflectometer) |