Which three options are examples of an overlay network? (Choose three.)
- IPv4
- LISP
- MPLS
- RIPv2
- IPX
- CAPWAP
Explanation: An overlay network is defined as a logical topology used to virtually connect devices that is built on top of an arbitrary physical underlay topology. According to the sources, common examples of overlay networks include Multiprotocol Label Switching (MPLS), Locator/ID Separation Protocol (LISP), and Control and Provisioning of Wireless Access Points (CAPWAP).
- LISP is utilized in the Cisco SD-Access fabric as the control plane to decouple an endpoint's identity from its location.
- MPLS is a mechanism used to create Layer 3 VPNs and provide path isolation over shared physical infrastructure.
- CAPWAP functions as a network overlay by forming a tunnel between an Access Point and a Wireless LAN Controller to transport all client traffic.
In contrast, IPv4 and IPX are typically referred to as "passenger protocols" that are encapsulated by these overlays, and RIPv2 is a traditional routing protocol.
Related exam: Modules 23 – 26: Checkpoint Exam: Software-Defined Networking Answers (CCNP ENCOR v9)
