# Glossary of terms

{.glossary}
BGP
: Border Gateway Protocol

CFS
: Customer Facing Service

eBGP
: External {term}`BGP`

GA
: Access Port

GAN
: Access Node

GAP
: GÉANT Automation Platform

GP
: Physical Port

iBGP
: Internal {term}`BGP`

IFS
: Interface Facing Service

MPLS
: Multi-Protocol Label Switching

MTTR
: Mean Time To Repair

MTU
: Maximum Transmission Unit

OOB
: Out-of-band

PoP
: Point of Presence

SDP
: Service Delivery Point

WFO
: <a href="https://workfloworchestrator.org/" target="_blank">Workflow Orchestrator</a>