P p Packet Packet Aggregation Packet Loss Packet Scheduler / Queueing Discipline Packetization Pairing PAP Pause Frames PBX PCM PCR §... ... Periodic Inform PID Ping PLC Traffic Policing PoP Port Port Forwarding Port Speed PPID PPP PPPoA PPPoE §... ... Precedence Prefix delegation Private Key Protocol Proxy Page Response Time Client Side PSK PSTN PTM - Pulse-Time Modulation PTM Priority Point-to-Point Tunneling Protocol Public Key Top ↑