Layer 2 and Layer 3 Logical Networks in Cisco SD-Access Architecture

D.

The technology used to provide Layer 2 and Layer 3 logical networks in the Cisco SD-Access architecture is the overlay network.

Cisco SD-Access is an architecture that provides end-to-end segmentation and policy enforcement for enterprise networks. It uses a software-defined network (SDN) approach to simplify network operations and management.

In SD-Access, the overlay network is created by encapsulating user traffic within a virtual network. The virtual network is overlaid on top of the physical network infrastructure and is used to provide Layer 2 and Layer 3 logical networks. The overlay network allows for the separation of network services from the underlying physical infrastructure, which simplifies network operations and provides greater flexibility.

The overlay network is created using virtual network overlays such as VXLAN (Virtual Extensible LAN) or LISP (Locator/ID Separation Protocol). These virtual network overlays provide the ability to create logical networks that are decoupled from the physical network infrastructure.

The underlay network, on the other hand, is the physical network infrastructure that provides connectivity between devices in the network. The underlay network is responsible for transporting the encapsulated traffic between the endpoints of the overlay network.

VPN routing/forwarding is a technology used to create secure, private networks over a public network infrastructure such as the Internet. It is commonly used to connect remote users or sites to a central network.

Easy Virtual Network (EVN) is a feature of Cisco IOS software that allows for the creation of multiple virtual networks within a single physical network infrastructure. It is primarily used for network segmentation and isolation.

In summary, the correct answer to the question is D. Overlay network is the technology used to provide Layer 2 and Layer 3 logical networks in the Cisco SD-Access architecture.