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 virtual link and ABRs

OSPF where do you configure a virtual link

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 - possible ping responses

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

Pseudowire

Public Key Certificate

Python - Parsing output of show commands

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 - 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 Modular QoS CLI (MQC)

QoS Network Based Application Recognition (NBAR)

QoS RSVP Path message

QoS RSVP Resv message

QoS Resource Reservation Protocol (RSVP)

PoE powered device (PD)

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