17 GLOSSARY |
|
TERM | DEFINITION |
| cable plant. Built on DOCSIS 1.1, PacketCable networks use IP |
| technology as the basis for a |
| architecture. |
| A |
| address from the Internet Service provider’s DHCP server. |
PAT | Port Address Translation |
PCI | Peripheral Component Interconnect |
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 digital assistant |
PDU | A protocol data unit is a message containing operational |
| instructions used for SNMP. The basic SNMP V2 PDU types are |
| |
| request, |
periodic | Ranging that is performed on an |
ranging | ranging has taken place. |
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 |
| which transmits bits or groups of bits 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 |
| 152 |