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BGP (Border Gateway Protocol): It's the protocol underlying the routing decisions on the internet, determining how data packets travel from one place to another across networks.

VXLAN and EVPN:

• VXLAN (Virtual Extensible LAN): A network virtualization technology that allows large-scale isolated Layer 2 networks over a Layer 3 network, increasing scalability.
• EVPN (Ethernet VPN): Enhances VXLAN by providing advanced networking features such as improved scalability, segmentation, and traffic optimization.

The FRRouting Project: An open-source project that implements routing protocols such as BGP, OSPF, and IS-IS. It's designed for modern routing needs, supporting Unix/Linux platforms.

Zebra (Software): A core part of the FRRouting project, managing the routing tables of the underlying operating system. It provides an abstraction layer between the routing protocols and the actual packet forwarding mechanism.

BGPD Service: A daemon from the FRRouting project responsible for implementing the BGP protocol. When active and configured, it manages BGP routing policies and paths.

OSPFD Service: Another daemon from the FRRouting project, handling the OSPF (Open Shortest Path First) protocol. It's used for automatically managing IP routing within a single routing domain.

IS-IS Routing Engine Service: Part of the FRRouting project, this service implements the IS-IS (Intermediate System to Intermediate System) protocol for routing within an organization, often used alongside BGP for large network infrastructures.