PHP meaning in Computing ?

Answer: What is Penultimate Hop Popping mean?

Penultimate hop popping (PHP) is a function performed by certain routers in an MPLS enabled network. It refers to the process whereby the outermost label of an MPLS tagged packet is removed by a Label Switch Router (LSR) before the packet is passed to an adjacent Label Edge Router (LER). The benefit is that the LSR has to do a label lookup anyway and it doesn't make a difference whether this results in a label swap or pop. However, for the LER this saves one cycle of label lookup.

The process is important in a Layer 3 MPLS VPN (RFC 2547) environment as it reduces the load on the LER. If this process didn't happen, the LER would have to perform at least 2 label lookups:

The outer label, identifying that the packet was destined to have its label stripped on this router.The inner label, to identify which Virtual Routing and Forwarding (VRF) instance to use for the subsequent IP routing lookup.

In large, loaded networks the additional time required for second label lookup can make a difference in the overall forwarding performance and reduce buffering.

PHP functionality is achieved by the LER advertising a label with a value of 3 to its neighbours. This label is defined as "implicit-null" and informs the neighbouring LSR(s) to perform PHP.

reference

Full Form	Category
IEEE Transactions on Parts, Hybrids, and Packaging	Academic & Science
Division of Public Health Practice	Academic & Science
Philip (sd)	Airport Code
Paul Hagan Productions	Business
Primary Health	Business
Provincial Heritage Property	Business
Parents Helping Parents	Community
People Helping People	Community
Peace, Happiness, and Prosperity	Community
Personal Handy Phone	Computer and Networking
Porn Hub Programming	Computing
People Have Problems	Computing
Php Hypertext Pre-Processing	Computing
Parsed Hypertext Pre-Processor	Computing
Physical Plan	Computing
Penultimate Hop Popping	Computing
Private Home Page	Computing
Philippine Peso	Country Currency
Partial Hospitalization Program	File Type
People Hate Perl	General
Push Harder Please	General
Photon Hypermega Phasor	General
Poison, Hypnotize, and Petrify	General
Poor Hippy Poker	General
Pretty Hot Programmer	General
Pretty Horrid Privacy	General
Phil-Pitt Steagles	General
Pretty Hot Pig	General
Probable Hacked Page	General
Preprocessed Hypertext Page	General
Powerfull Hippy People	General
PHP Hypertext Processor	General
Porsche Human Performance	General
Peak Horse Power	General
Pennsylvania Highway Patrol	General
Philadelphia Highway Patrol	General
Punjab Highway Patrol	General
Personal History Profile	Governmental
PHP: Hypertext Preprocessor	Information Technology
Personal Home Page	Internet
Pseudohypoparathyroidism	Medical
Percutaneous Hepatic Perfusion	Medical
Population Health Portal	Medical
Physicians Health Plan	Medical
Psychological Health Program	Medical
People Have Posted	Messaging
Please Have Patience	Messaging
Hypertext Preprocessor	Programming Language
Phillip Airport, Philip, South Dakota USA	Regional
People's Heritage Party	Regional
Payload Handling Panel	Space Science
Personal Hand Practice	Sports
Philip Airport	Transport & Travel