6.3 Describe Controller-Based, Software Defined Architecture (overlay, Underlay, and Fabric) 200-301 Practice Questions (Page 8)

Questions 36–37

1. 36foundation · easy

   In a software-defined networking (SDN) architecture, what is the primary function of the control plane?

   • AMonitoring and logging network traffic for compliance and auditing purposes
   • BMaking decisions about how traffic should be forwarded and programming the data plane
   • CEncrypting all traffic that traverses the network to ensure confidentiality
   • DForwarding data packets between interfaces based on the forwarding table
   Reveal Solution Discussion Select an answer first
2. 37application · medium

   A network architect is designing a multi-tenant data center using VXLAN overlays. Each tenant has its own virtual network, and the underlay is a shared IP fabric. The architect wants to ensure that tenant traffic is isolated and that the underlay does not need to know about tenant-specific MAC addresses. Which statement best describes how the overlay and underlay interact in this design?

   • AThe underlay and overlay are the same network, so tenant isolation is achieved through VLANs.
   • BThe overlay encapsulates tenant frames in VXLAN, and the underlay routes the encapsulated packets based on the outer IP header.
   • CThe overlay uses the underlay's routing table to make forwarding decisions based on tenant IP addresses.
   • DThe underlay learns tenant MAC addresses and builds a separate forwarding table for each tenant.
   Reveal Solution Discussion Select an answer first