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Zorluk: KolaySoftware-Defined Architectures: Overlay, Underlay, and Fabric

In a software-defined fabric architecture, which protocol operates specifically at the overlay layer to encapsulate end-host Ethernet frames inside IP/UDP packets across the physical transport infrastructure?

  1. VXLANCevap
  2. B
    IS-IS
  3. C
    SNMP
  4. D
    LACP

Cevap

VXLAN is the correct protocol operating at the overlay layer for encapsulation.
VXLAN (Virtual Extensible LAN) is the data plane encapsulation technology used in SDN overlays (such as Cisco SD-Access and VXLAN EVPN) to encapsulate original Layer 2 frames within IP/UDP headers to transport traffic over the physical underlay infrastructure.

Adım Adım Çözüm

1
Identify the primary role of the overlay layer in software-defined network architectures.
The overlay layer creates virtual tunnels (tunnels end-user frames across the physical network) using data plane encapsulation.
Overlay networks decouple logical tenant services from physical topology.
2
Match the protocols to their architectural layers (Underlay vs. Overlay vs. Management).
VXLAN provides MAC-in-UDP encapsulation for overlay transport, whereas IS-IS provides underlay IP routing, SNMP manages devices, and LACP bundles physical ports.
VXLAN is designed specifically to encapsulate Layer 2/3 user payloads inside standard UDP packets.

Anahtar Kavram

Overlay Data Plane Encapsulation with VXLAN
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Konular

Software-Defined Architectures: Overlay, Underlay, and Fabric

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