A service provider is deploying a virtualized broadband network gateway (vBNG) as a VNF on an NFVI cluster. The vBNG performs per-packet processing and must sustain line-rate throughput with minimal latency. The NFVI uses dual-socket servers with 2 NUMA nodes per socket. During performance testing, the vBNG shows high CPU steal and packet drops. Which configuration is most effective to improve performance?

Increase the number of vCPUs assigned to the vBNG VM and enable CPU overcommitment on the hypervisor.

Enable SR-IOV on the physical NICs and assign virtual functions to the vBNG VM, pinning its vCPUs to a single NUMA node.

Place the vBNG VM on a single NUMA node and use the default virtio-net driver for all interfaces.

Disable hyperthreading on the host and rely on the hypervisor's automatic NUMA balancing.

A VNF instance has experienced a software crash and is no longer responding. The NFV Orchestrator has detected the failure. According to the NFV MANO framework, what is the typical sequence of actions to restore service?

The EMS patches the VNF in place to fix the crash.

The VIM directly restarts the VNF instance using a saved snapshot.

The VNFM terminates the faulty instance and instantiates a new instance, then the NFVO updates the network service topology.

The NFVO directly instantiates a new VNF instance without involving the VNFM.

A service provider is modernizing its network functions by converting a monolithic VNF into microservices. The team wants to deploy these microservices as containerized network functions (CNFs) and needs a platform that provides automated scheduling, scaling, and service discovery. Which approach should the team adopt?

Deploy the CNFs using a simple script that starts containers on each server

Deploy the CNFs on a Kubernetes cluster

Deploy the CNFs as VMs on the existing NFVI

Deploy the CNFs directly on bare-metal servers without orchestration

A service provider is designing an NFVI to host VNFs that require high-throughput packet processing. They plan to use commodity servers. Which network interface technology should they use to achieve the best I/O performance?

SR-IOV with virtual functions assigned directly to VMs.

A single physical NIC shared by all VMs without SR-IOV.

Virtio-net with the hypervisor's virtual switch.

Use of a software switch like Open vSwitch without offload.

CiscoCertified Network Professional Service Provider

Domain 1Objective 3

1.3 Describe Service Provider Virtualization 350-501 Practice Questions (Page 4)

Part of the Architecture domain, which accounts for 15% of the 350-501 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 1–2 from this objective — we provide 37 practice questions to prepare you well beyond it. (estimate)

37questions here

8free pages

8concepts

15%of the exam

Questions 16–20

16application · medium
A service provider is deploying a virtualized broadband network gateway (vBNG) as a VNF on an NFVI cluster. The vBNG performs per-packet processing and must sustain line-rate throughput with minimal latency. The NFVI uses dual-socket servers with 2 NUMA nodes per socket. During performance testing, the vBNG shows high CPU steal and packet drops. Which configuration is most effective to improve performance?
Select an answer first
17application · medium
A VNF instance has experienced a software crash and is no longer responding. The NFV Orchestrator has detected the failure. According to the NFV MANO framework, what is the typical sequence of actions to restore service?
Select an answer first
18application · medium
A service provider is modernizing its network functions by converting a monolithic VNF into microservices. The team wants to deploy these microservices as containerized network functions (CNFs) and needs a platform that provides automated scheduling, scaling, and service discovery. Which approach should the team adopt?
Select an answer first
19application · medium
A service provider is designing an NFVI to host VNFs that require high-throughput packet processing. They plan to use commodity servers. Which network interface technology should they use to achieve the best I/O performance?
Select an answer first
20foundation · easy
Which Linux kernel feature provides process isolation for containers by giving each container its own view of the system, such as its own process list and network stack?
Select an answer first

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1.3 Describe Service Provider Virtualization 350-501 Practice Questions (Page 4)

Questions 16–20

A VNF instance has experienced a software crash and is no longer responding. The NFV Orchestrator has detected the failure. According to the NFV MANO framework, what is the typical sequence of actions to restore service?

A service provider is designing an NFVI to host VNFs that require high-throughput packet processing. They plan to use commodity servers. Which network interface technology should they use to achieve the best I/O performance?

Which Linux kernel feature provides process isolation for containers by giving each container its own view of the system, such as its own process list and network stack?

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