Virtual Network Functions (VNFs) JN0-214 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which factor is most likely to impact the throughput of a VNF?

   • AThe color of the VNF's management interface
   • BThe number of VNFs in the service chain
   • CThe amount of CPU and memory allocated to the VNF
   • DThe vendor of the hypervisor
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A VNF is experiencing performance degradation due to increased traffic. The VNF is currently running on a single VM. The operator needs to increase the VNF's capacity to handle the load. Which scaling approach is most appropriate?

   • AScale up by increasing the VM's vCPU and memory resources.
   • BScale out by adding more VM instances and load balancing traffic between them.
   • CTerminate the VNF and re-instantiate it with more resources.
   • DMove the VNF to a different host with more resources.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A service provider is redesigning its edge network to offer a new managed firewall service to enterprise customers. The provider wants to deploy the firewall as a software instance on commodity x86 servers in its regional data centers, rather than as a dedicated hardware appliance. Which statement best describes the role of this software firewall in an NFV architecture?

   • AIt is a virtual machine that hosts a network service but does not itself perform any network function.
   • BIt is a physical network function that is being emulated in software for testing purposes only.
   • CIt is a network function that requires proprietary hardware to achieve the same throughput as a physical appliance.
   • DIt is a VNF that runs as a virtualized software instance, decoupled from dedicated hardware, and can be instantiated on demand.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   In an NFV architecture, what is the primary role of a Virtual Network Function (VNF)?

   • ATo orchestrate the lifecycle of other VNFs
   • BTo provide a virtualized compute, storage, and network resource pool
   • CTo provide network functionality, such as routing or firewalling, as software running on virtualized infrastructure
   • DTo manage the physical servers and storage in a data center
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A VNF has been running for several months and needs to be updated to a new software version. The update must be performed without interrupting the service. Which lifecycle management operation should be used?

   • AScale-in
   • BTerminate and re-instantiate
   • CSnapshot and restore
   • DRolling update
   Reveal Solution Discussion Select an answer first