WiFoo..The.Secrets.of.Wireless.Hacking [Electronic resources] نسخه متنی

P

parabolic dish antenna

An antenna that uses a dishlike reflector to focus radio energy of a specific range of frequencies on a tuned element.

grid antenna.

Part 15 rules

The FCC regulation that regulates unlicensed use of the Industrial, Scientific, and Medical (ISM) bands for wireless networking and other uses.

patch antenna

Typically a flat, rectangular or round antenna having a hemispherical pattern.

path budget

A mathematical model of a wireless communications link that accounts for a wide variety of factors that affect operating range and performance. Sometimes called a link budget.

path loss

The weakening of a signal over its path of travel due to various factors such as terrain, obstructions, and environmental conditions.

PCMCIA

Personal Computer Memory Card Association. This is a standard for PC expansion cards used on laptop computers and other portable devices. It is often used for memory and data storage as well as communication devices, and uses a 16-bit interface. Often referred to as PC card.

PEAP

Protected Extensible Authentication Protocol. Provides an EAP activity in a protected tunnel. Two types exist today, which were defined by Microsoft and Cisco and are not compatible with each other.

peer-to-peer network

All nodes on the network have equal access to and control of the network medium.

physical layer (PHY)

Provides for the transmission of data through a communications channel by defining the electrical, mechanical, and procedural specifications for IEEE 802 LANs.

PN

pseudo-noise. A digital signal with noiselike properties.

point to multipoint

A communications channel that runs from one point to several other points.

point to point

A communications channel that runs from one point to another.

polling

A process in which a device polls the terminals connected to it, asking whether they have data to be sent to the host.

power meter

A device used to measure radio energy.

professional installer

Someone who has been trained in the applicable rules and regulations, is receiving compensation for his or her work, has knowledge of radio emissions, and can verify that a site that deviates from the standard product set requirements meets the limitations of the FCC rules.

propagation

The travel of a signal through a medium such as air or free space.