Motorola WU830G User's Guide download pdf (Page 132)

SBG900 User Guide 125

Overview Installation Troubleshooting Contact FAQ Specifications Glossary License

Configuration: Basic Gateway TCP/IP Wireless USB

packet The unit of data that is routed between the sender and destination on the Internet or other

packet-switched network. When data such as an e-mail message or other file is sent over the Internet,

IP on the sender divides the data into uniquely-numbered packets. The packet header contains the

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-

switched

A scheme to handle transmissions on a connectionless network such as the Internet. An alternative is

circuit-switched.

PacketCable A CableLabs-led project to define a common platform to deliver advanced real-time multimedia

services over two-way HFC cable plant. Built on DOCSIS 1.1, PacketCable networks use IP

technology as the basis for a highly-capable multimedia architecture.

pass-through A pass-through client on the SBG900 LAN obtains its public IP address from the cable provider 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 get-request, get-next-request, get-bulk-request, response, set-request,

inform-request, and trap.

periodic

ranging

Ranging that is performed on an on-going basis after initial 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 media-dependent sublayer of the physical layer which transmits bits or groups of bits

over particular types of transmission links between open systems. It entails the electrical, mechanical,

and handshaking procedures.

point-to-point 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

port mirroring A feature that enables one port (source) on the SBG900 to be copied to another port (destination) to

be studied. The destination mirrors the transmitted (from) or received (to) data on the source port to

enable the person managing the network to monitor activity.

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