Category: Letter P
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PoE Vendor Extensions to the Standard
After 802.3at made it possible to provide roughly 30 watts over two pairs of wires, it was a relatively straightforward process to extend the standard to provide power over four pairs simultaneously.
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PoE Port Management
To manage these power loads, vendors of switches typically program the switches to provision power one port at a time, this is PoE Port Management.
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PoE and Cable Pairs
The PoE standard specifies the way that power is injected into the Ethernet cable pairs, and which pairs should be used.
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How Power Over Ethernet works – PoE Operations
Understanding how PoE works. The idle state and three operational states: detection, classification, and operation.
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PoE Device Roles and Type Parameters
For those who want to delve into the details of the Power over Ethernet technology, here we discuss PoE devices roles and type parameters.
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P-Series Protocols
Learn what P-Series Protocols are. A group of protocols that are part of the X.400 messaging standards.
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Personal Digital Assistant (PDA)
A Personal Digital Assistant (PDA) was a handheld computer that was programmed for functions such as keeping track of appointments, sending and receiving e-mail, browsing the Internet, composing memos, performing spreadsheet calculations, managing contacts, banking, and viewing stock quotes.
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Parallel Transmission
Learn what is Parallel Transmission, the difference between serial and parallel transmission, IEEE 1284 standard (SPP, EPP and ECP) and many other questions we may want to know the answers to.
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Physical Medium Dependent (PMD)
Physical Medium Dependent, also known as PMD, defines the details of transmission and reception of individual bits on a physical medium.
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Password Authentication Protocol (PAP)
In this article, we will unravel the layers of Password Authentication Protocol (PAP), exploring its operations, advantages, and its place in the ever-evolving landscape of network security protocols.
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Power-on Self Test (POST): Ensuring System Integrity from Startup
Power-On Self Test is a special set of ROM routines that run whenever a PC is booted. The power-on self test (POST) is designed to test whether system components are functioning properly before attempting to boot the operating system, and checks such things as the RAM, keyboard, and disk drives.
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PSTN or Public Switched Telephone Network
Public Switched Telephone Network, also known as PSTN, is the public telephone network managed by the local telco and long-distance carriers. The Public Switched Telephone Network (PSTN) consists of a digital backbone of switched circuits together with the analog local loop wiring still found in many residences.