PoE - Understanding Maximum Power

PoE Passive

PoE Standards-based

PoE power sourcing equipment (PSE)


[PoE](/poe-what-is-it) delivers DC electrical power over [Ethernet](/ethernet) cables to connected network devices.  The device receiving and using that power is called the Powered Device or PD.

Examples of PDs include:

* IP phones
* [wireless](/physical-layer-wireless-medium) access points
* IP cameras
* Internet of Things devices
* Point of Sale (PoS) devices
* Small routers or switches
* In some cases, TVs or laptops

The PD will connect to the Power Sourcing Equipment (PSE) to receive power.  A PD and PSE will either negotiate the power requirements using [standards-based PoE](/poe-standards-based) or "Active" PoE, or it will receive whatever power is delivered using [Passive PoE](/poe-passive).


## Links

https://networklessons.com/cisco/ccna-200-301/power-over-ethernet-poe

PoE powered device (PD)

OSPF why is a backbone area 0 necessary

OSPF within what area is an OSPF router considered to be

OSPF

OSPFv2 and OSPFv3 comparison

OSPFv3 - router ospfv3 command

OSPFv3 communication between routers and next hop addresses

OSPFv3 instance ID

Offset-list

PAT (overloading) maximum number of translations per inside global address

PAgP

PBR - Policy Based Routing

PBR - Transport Layer port number

PBR - load balancing

PBR - matching prefix lists

PBR - route-map and ACL deny statements not supported

PBR - set interface command

PBR next hop recursive

PBR next hop verify availability

PBR next-hop and default next-hop

PPPoE

PSTN

PTP - Best Master Clock Algorithm

PTP - Clock Types

PTP - Interface Roles

PTP - Offset and Delay times

PTP - Precision Time Protocol

Passive interface

Physical layer - Copper medium

Physical layer - Optical fiber medium

Physical layer - Wireless medium

Physical layer - carrier wave

Physical layer - encoding

Physical layer - media

Physical layer - modem

Physical layer - modulation

Ping - Specify ToS

Ping - common reasons for failure

Ping - debug commands

Ping - extended feature

Ping - possible ping responses

Ping - specifying size

Ping - sweep range of sizes

Ping - troubleshooting concepts

Ping

PoE over Gigabit Ethernet

PoE what is it

Point-to-Point Protocol (PPP)

Policy Based Routing acts on incoming traffic

Prefix Lists - Operators

Prefix Lists

Private VLANs - across a trunk

Private VLANs - non-operational type

Private WAN

Protocol Data Unit (PDU)

Protocol Independent Multicast (PIM)

Protocols with LFA support

Proxy ARP Best Practices

Pseudowire

Public Key Certificate

Python - Parsing output of show commands

Python - Performing Tasks Concurrently

Python - viewing code using trinket.io

Python Paramiko SSH

Python stdin, stdout, stderr

QOS - Multilayer Switch QoS (MLS)

QoS - Assured Forwarding PHB values

QoS - Bc and Be bucket sizes

QoS - CBWFQ

QoS - Classification by IP

QoS - CoS to DSCP and DSCP to CoS mapping

QoS - Hierarchical QoS

QoS - Jitter

QoS - LLQ applied only outbound

QoS - LLQ bandwidth configuration

QoS - LLQ priority commands

QoS - Nested policy maps

QoS - Policing command syntax

QoS - QoS Groups

QoS - RSVP bandwidth and flow reservations

QoS - Recommended router images for QoS labs in GNS3

QoS - Tail Drop

QoS - Using CBWFQ with traffic shaping

QoS - WRED traffic profile thresholds

QoS - applying policies

QoS - auto qos trust

QoS - classification

QoS - effects of bandwidth interface command

QoS - is WRED really a congestion avoidance mechanism

QoS - key and nonkey fields

QoS - marking

QoS CBWFQ traffic allocation when there are empty queues

QoS CoS vs DSCP

QoS Hierarchical Queuing Framework (HQF)

QoS Impact of Priority Queue on Class-Default Traffic

QoS Modular QoS CLI (MQC)

PoE powered device (PD)

Links

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