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Overview Installation Troubleshooting | Contact | FAQ | Specifications | Glossary | License |
Configuration: Basic | Gateway | TCP/IP | Wireless USB | ||
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P
packet | The unit of data that is routed between the sender and destination on the Internet or other |
| |
| IP on the sender divides the data into |
| source and destination IP addresses. The individual packets may travel different routes. When all |
| packets arrive at the destination, IP at that end reassembles the packets. The header and the data can |
| vary in length. Packet and datagram are similar in meaning. |
packet- | A scheme to handle transmissions on a connectionless network such as the Internet. An alternative is |
switched | |
PacketCable | A |
| services over |
| technology as the basis for a |
| A |
| server. |
PAT | Port Address Translation |
PCI |
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PCMCIA | The Personal Computer Memory Card International Association sets international standards for |
| connecting peripherals to portable computers. Laptop computers typically have a PCMCIA slot that |
| can hold one or two PC Cards to provide features such as Ethernet connectivity. |
PDA | personal desktop assistant |
PDU | A protocol data unit is a message containing operational instructions used for SNMP. The basic |
| SNMP V2 PDU types are |
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periodic | Ranging that is performed on an |
ranging |
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physical layer | Layer 1 in the OSI architecture. It provides services to transmit bits or groups of bits over a |
| transmission link between open systems. It entails the electrical, mechanical, and handshaking |
| procedures. |
piggybacking | A process that occurs when a cable modem simultaneously transmits data and requests additional |
| bandwidth. |
PING | A network utility that tests host reachability by sending a small packet to the host and waiting for a |
| reply. If you PING a computer IP address and receive a reply, you know the computer is reachable |
| over the network. It also stands for “Packet InterNet Groper.” |
PMD | The physical |
| over particular types of transmission links between open systems. It entails the electrical, mechanical, |
| and handshaking procedures. |
Physical connection made from one point to another. | |
POTS | The “plain old telephone service” offered through the PSTN; basic analog telephone service. POTS |
| uses the lowest 4 kHz of bandwidth on twisted pair wiring. |
port | On a computer or other electronic device, a port is a socket or plug used to physically connect it to the |
| network or to other devices. |
| in TCP/IP, a port is a number from 0 to 65536 used logically by a client program to specify a server |
| program. Ports 0 to 1024 are reserved |
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