Enterasys Networks Fast Network 10 - Manual (Page 126)

Appendix B: Glossary
Page B-8 Fast Network 10 User Guide
packet
A group of bits including data and control elements arranged in a specific
format that are transmitted and switched as a composite whole. Control
elements include a source address, destination address, frame control and
status indicators, and a Frame Check Sequence (FCS).
PDU (protocol data unit)
The portion of a datagram that contains the data associated with a
particular protocol.
peer-to-peer
Term used to describe data transmission between entities in the same
sublayer of the OSI model.
physical layer
Layer 1 of the OSI model. Defines and handles the electrical and physical
connections between systems.
power budget
The difference between transmit power and receiver sensitivity, including
any safety margins.
PPP (point-to-point protocol)
A protocol for transmitting datagrams (IP or MAC packets) over a serial
point-to-point link (e.g., the out-of-band management port).
pps (packets per second)
Unit of measure used to express packet data throughput. 18 pps is
approximately equal to 9600 bps.
propagation delay
The time it takes for a signal to travel across a network.
protocol
A set of rules used by computers and related devices to communicate with
each other.
protocol suite
A group of protocols related to a common framework.