PHY (PHYsical Layer)

See Physical Layer.

• Classical IP over ATM (Classical Internet Protocol over Asynchronous Transfer Mode)
• Classless Inter-Domain Routing (CIDR)
• class of service (CoS)
• Class X ATM traffic
• clear channel
• clear to send (CTS)
• CLEC (Competitive Local Exchange Carrier)
• CLID (Calling Line IDentification)
• client
• client mesh
• client/server
• Clipper Chip
• CLNP (ConnectionLess Network Protocol)
• clocking pulse
• closed circuit television (CCTV)
• closed-loop algorithm
• closed user group (CUG)
• cloud
• cloud
• CLP (Cell Loss Priority)
• CLP (Cell Loss Priority)
• CLR (Cell Loss Ratio)
• CM (Cable Modem)
• cm (centimeter)
• CMR (Cell Misinsertion Rate)