Motorola SBG1000 manual 137

Overview Installation Troubleshooting Contact FAQ Specifications Glossary License

Configuration: Basic Gateway TCP/IP Wireless Print Server USB

P

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-	A scheme to handle transmissions on a connectionless network such as the Internet. An alternative is
switched	circuit-switched.
PacketCable	A CableLabs®-led project to define a common platform to deliver advanced real-time multimedia
	services over two-wayHFC 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 SBG LAN obtains its public IP address from the cable service provider
	DHCP server.
PAT	Port Address Translation
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 get-request, get-next-request, get-bulk-request, response, set-request,
	inform-request, and trap.
periodic	Ranging that is performed on an on-going basis after initial ranging has taken place.
ranging
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.”
PJL	(Hewlett-Packard) Printer Job Language
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 SBG1000 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.
		X	137	SBG1000 Wireless Cable Modem Gateway User Guide

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