Overlay Versus Underlay Networks JN0-281 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A company is migrating its virtualized workloads to a new data center. The network team wants to ensure that VM mobility is not restricted by the physical location of the servers. Which benefit of an overlay network directly addresses this requirement?

   • AThe overlay decouples the logical network from the physical topology, allowing VMs to move anywhere in the fabric while keeping their IP address.
   • BThe overlay automatically configures the physical switches to support VM moves.
   • CThe overlay provides higher bandwidth than the physical underlay, ensuring performance is maintained during migration.
   • DThe overlay eliminates the need for IP routing in the data center, simplifying VM mobility.
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2. 7application · medium

   A company is deploying a new application that requires Layer 2 adjacency between servers in two different buildings connected by a routed WAN. The WAN does not support Layer 2 protocols. Which solution allows the application to function as required?

   • AUse a VPN tunnel to create a point-to-point Layer 2 link between the buildings.
   • BPlace all servers in the same broadcast domain using VLAN tagging across the WAN.
   • CRe-architect the application to use IP addresses instead of Layer 2.
   • DDeploy a VXLAN overlay across the WAN to extend the Layer 2 segment over the routed IP network.
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4. 8application · medium

   A data center operator is deploying a multi-tenant virtualized environment. Each tenant requires isolated Layer 2 segments that can span across multiple racks in the physical data center. The physical network uses a spine-and-leaf IP fabric with no Layer 2 adjacency between leaf switches. Which approach satisfies the tenant requirement?

   • APlace all tenant workloads in a single broadcast domain on one leaf switch to avoid the need for inter-rack communication.
   • BConfigure VXLAN on the leaf switches to encapsulate tenant Ethernet frames in IP packets that traverse the spine-and-leaf fabric.
   • CConnect all leaf switches with a Layer 2 mesh using spanning tree to provide a flat Ethernet fabric for all tenants.
   • DUse static VLANs on the spine switches to trunk tenant traffic between leaf switches.
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5. 9application · medium

   A data center architect is planning the underlay for a VXLAN-based overlay. The design must support high-performance computing (HPC) workloads that are sensitive to latency. Which underlay design consideration is most important to meet this requirement?

   • AEnsure the underlay provides low-latency, high-bandwidth IP connectivity between all leaf switches.
   • BRequire the underlay to support MPLS to reduce encapsulation overhead.
   • CConfigure the underlay to use a single broadcast domain to reduce forwarding delays.
   • DUse a hub-and-spoke topology to minimize the number of hops between leaf switches.
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6. 10application · medium

   An organization is designing the physical network for a new data center that will host a large overlay network using VXLAN. The design team needs to ensure the physical infrastructure can efficiently carry the encapsulated overlay traffic. Which characteristic is most critical for the underlay network to support this overlay?

   • AProprietary encapsulation support on every physical switch in the fabric.
   • BA single broadcast domain across the entire data center to simplify ARP handling.
   • CSupport for IP routing with high bandwidth and low latency between all switches.
   • DNative Layer 2 adjacency between all access switches to simplify VLAN trunking.
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