P p Packet Aggregation Packet Loss Packet Scheduler / Queueing Discipline Packetization Pairing PAP Pause Frames PBX PCR Peak Load PEM §... ... Periodic Inform Ping PKCS PLC Traffic Policing PoP Port Port Forwarding Port Speed PPP PPPoE Prefix delegation §... ... Preserve Value Private Key Protocol Proxy PSDN PSK PSTN PTM - Pulse-Time Modulation PTM Priority Point-to-Point Tunneling Protocol Public Key Top ↑