hub

A central point of interconnection for devices on a local area network (LAN) or LAN segment.

Hubs act as passive LAN concentrators and repeaters, with a single internal collapsed backbone bus typically running at a signaling rate of 10/100 Mbps. LAN-attached devices such as workstations, peripherals, and servers typically connect to a hub via either unshielded twisted pair (UTP) or shielded twisted pair (STP). Hubs operate at Layer 1, the Physical Layer of the OSI Reference Model. Filtering hubs also operate at a portion of Layer 2, the Data Link Layer. See also 10Base-T, 100Base-T, concentrator, Data Link Layer, LAN, OSI Reference Model, Physical Layer, repeater, STP, and UTP.

• plesiochronous
• Plesiochronous Digital Hierarchy (PDH)
• Plesiochronous Digital Hierarchy (PDH)
• PLP (Packet Layer Protocol)
• plug
• Plug and Play (PnP)
• plug ’n’ play (plug and play)
• PM
• PMD (Polarization Mode Dispersion)
• PMI (Property Management Interface)
• PNG (Portable Network Graphics)
• PNNI
• PnP (Plug and Play)
• PnP (Plug and Play)
• PN (Pseudorandom Noise or PseudoNoise)
• PoC (Push-to-talk over Cellular)
• PoC (Push-to-talk over Cellular)
• POCSAG (Post Office Code Standardization Advisory Group)
• PoE (Power over Ethernet)
• POF (Plastic Optical Fiber)
• POH (Path OverHead)
• pointer
• point of presence (POP)
• point of termination (POT)
• point-to-multipoint circuit