350-601 Practice Test 24 — 15 Questions

Question 1

A network engineer is configuring a VPC peer-link on a Nexus switch. Which interface configuration is required for the peer-link port-channel?

Accepted Answer

switchport mode trunk. A VPC peer-link is a special port-channel that carries control traffic (e.g., Cisco Fabric Services over Ethernet) and data traffic between VPC peer switches. It must be configured as a trunk (switchport mode trunk) to allow multiple VLANs, including the VPC VLAN and the peer-keepalive link VLAN, to traverse the link. Without trunk mode, the peer-link cannot properly forward the necessary VLAN traffic for VPC operation.

Answer

spanning-tree port type edge trunk

Answer

switchport mode access

Answer

no switchport

Question 2

Which type of UCS service profile allows an administrator to define a configuration that can be used as a starting point for multiple servers, with each server potentially having unique settings?

Accepted Answer

Service profile template. A service profile template in UCS Manager is a reusable configuration blueprint that defines settings such as vNICs, vHBAs, boot policy, and BIOS policy, which can then be used to create multiple service profiles. Each derived service profile can be customized with unique settings (e.g., UUID, MAC addresses, WWNNs) while inheriting the template's baseline configuration.

Answer

Initial service profile

Answer

Derived service profile

Answer

Base service profile

Question 3

A data center engineer is implementing FCoE and must ensure lossless behavior for Fibre Channel traffic over Ethernet. Which Data Center Bridging (DCB) mechanism prevents frame loss by pausing traffic on a per-priority basis?

Accepted Answer

Priority Flow Control (PFC). Priority Flow Control (PFC) is a Data Center Bridging (DCB) mechanism that prevents frame loss by pausing traffic on a per-priority basis. It allows different priorities of traffic to be paused independently, ensuring that loss-sensitive traffic like Fibre Channel over Ethernet (FCoE) is not dropped due to congestion from other traffic types.

Answer

Data Center Bridging Exchange (DCBX)

Answer

FCoE Initialization Protocol (FIP)

Answer

Enhanced Transmission Selection (ETS)

Question 4

An organization's storage network uses RAID-10 for critical databases. The storage array has 12 disks. How many disks can fail simultaneously without data loss, assuming the worst-case scenario?

Accepted Answer

6. RAID-10 mirrors data across pairs of disks and then stripes across those mirrored pairs. With 12 disks, you have 6 mirror pairs. In the worst-case scenario, you can lose one disk from each mirror pair — 6 disks total — without data loss, because each pair still retains one intact copy.

Answer

11

Answer

2

Answer

1

Question 5

Refer to the exhibit. Two Nexus switches are connected via Ethernet1/1. MKA does not initiate. What is the issue?

Accepted Answer

The policy is not applied to the interface. The exhibit shows that the MACsec policy is defined but not applied to interface Ethernet1/1. Without applying the policy using the `macsec policy` command under the interface configuration, MKA (MACsec Key Agreement) cannot initiate because the switch does not know which security policy to enforce on that link.

Answer

The interface is not administratively up

Answer

The cipher-suite is not supported

Answer

The MACsec key chain is missing

Question 6

A DevOps engineer is building a CI/CD pipeline for network changes. After a configuration change is pushed to a Nexus switch, which step should be included to verify that the change did not cause any operational issues?

Accepted Answer

Automated validation using show commands or telemetry. Automated validation using show commands or telemetry is the best step to verify that the configuration change did not cause operational issues. It provides immediate, objective feedback on the switch's state and performance, allowing quick detection of problems. This aligns with CI/CD principles of automated testing and validation.

Answer

Manual verification by an engineer

Answer

Immediate rollback to previous configuration

Answer

Logging the change without verification

Question 7

An engineer is configuring a Fibre Channel over Ethernet (FCoE) deployment. The network must ensure lossless transport for FCoE traffic. Which Data Center Bridging (DCB) feature must be enabled to provide no-drop service for FCoE frames?

Accepted Answer

Priority Flow Control (PFC). Priority Flow Control (PFC) is the DCB feature that provides no-drop, lossless service for FCoE frames by pausing specific priority classes (CoS) when congestion occurs. FCoE requires a lossless Ethernet fabric because Fibre Channel assumes reliable delivery; PFC uses IEEE 802.1Qbb pause frames per priority to prevent buffer overflow and frame drops. Enabling PFC on the FCoE VLAN/priority is mandatory for lossless FCoE transport.

Answer

Jumbo frames

Answer

Enhanced Transmission Selection (ETS)

Answer

Data Center Bridging Exchange (DCBX)

Question 8

In a spine-leaf architecture with 40 leaf switches and 4 spine switches, each leaf has four 40G uplinks to the spines. What is the oversubscription ratio if each leaf has 48 ports of 10G for servers?

Accepted Answer

3:1. The oversubscription ratio is calculated by comparing total server bandwidth to total uplink bandwidth. Each leaf has 48 ports × 10G = 480G of server-facing bandwidth, and 4 uplinks × 40G = 160G of spine-facing bandwidth. The ratio is 480:160 = 3:1, meaning three times as much server bandwidth as uplink bandwidth, which is a common design target in Cisco ACI and NX-OS spine-leaf fabrics.

Answer

2:1

Answer

5:1

Answer

4:1

Question 9

Which Fibre Channel address component identifies the port on a storage target?

Accepted Answer

WWPN. The World Wide Port Name (WWPN) is a 64-bit identifier assigned to each individual port on an FC device, so it uniquely identifies the specific port on a storage target (or initiator). Zoning and LUN masking are typically performed using WWPNs, which is why it is the correct answer for identifying a port.

Answer

WWNN

Answer

FCID

Answer

VSAN ID

Question 10

In a Fibre Channel over Ethernet (FCoE) deployment, which Data Center Bridging (DCB) feature is responsible for preventing frame loss due to congestion and ensuring the lossless behavior required for FCoE traffic?

Accepted Answer

Priority Flow Control (PFC). Priority Flow Control (PFC) is the DCB feature that provides lossless behavior for FCoE by pausing specific traffic classes when congestion occurs. It ensures that FCoE frames are not dropped due to buffer exhaustion, which is critical because Fibre Channel expects a lossless medium. PFC operates on a per-priority basis, allowing storage traffic to be paused independently of other traffic.

Answer

Data Center Bridging Exchange (DCBX)

Answer

Enhanced Transmission Selection (ETS)

Answer

Jumbo frames

Question 11

Which Fibre Channel addressing component identifies a specific port on a host or storage device uniquely in the fabric?

Accepted Answer

WWPN. The World Wide Port Name (WWPN) is a unique 64-bit identifier assigned to each Fibre Channel port on a host bus adapter or storage device. It is used in zoning and LUN masking to identify specific ports in the fabric. The question asks for the component that identifies a specific port uniquely, which is the WWPN.

Answer

WWNN

Answer

VSAN ID

Answer

FCID

Question 12

A Fibre Channel switch port is experiencing high latency due to insufficient buffer credits. What is the most likely cause?

Accepted Answer

Long-distance link between switches. In Fibre Channel (FC) networks, buffer credits are a flow control mechanism that allows a sender to transmit frames without waiting for an acknowledgment. Long-distance links require more buffer credits to keep the link fully utilized because the round-trip time (RTT) is higher. If insufficient buffer credits are allocated, the port will experience high latency as it must wait for credits to be returned before sending more frames.

Answer

CRC errors on the fibre optic cable

Answer

High oversubscription ratio on the port

Answer

VSAN ID mismatch between end devices

Question 13

An engineer is configuring FCoE on a Cisco UCS Fabric Interconnect. The network requires lossless Ethernet to support FCoE traffic. Which Data Center Bridging (DCB) feature must be enabled first to ensure no frames are dropped due to congestion?

Accepted Answer

PFC. Priority Flow Control (PFC) is the DCB feature that ensures lossless Ethernet for FCoE by pausing specific traffic classes when congestion occurs, preventing frame drops. PFC must be enabled first because FCoE requires a lossless fabric to avoid dropping storage frames, which would cause I/O errors. Without PFC, congestion could lead to dropped FCoE frames, breaking the storage network.

Answer

ETS

Answer

DCBX

Answer

FIP

Question 14

An engineer is troubleshooting connectivity between two Nexus 9000 switches configured with vPC. The vPC peer link is up, but the vPC peer-keepalive link is failing. Which action should be taken to ensure vPC convergence in the event of a peer-link failure?

Accepted Answer

Ensure the peer-keepalive link uses a dedicated management interface or a separate VRF.. When the vPC peer link fails, the peer-keepalive link is used by the secondary switch to detect that the primary is still alive and to avoid becoming the primary (which would cause a split-brain scenario). Using a dedicated management interface or a separate VRF ensures the keepalive messages are isolated from the data plane and remain reachable even if the peer link goes down, allowing the secondary to correctly keep its vPC member ports in a suspended state and maintain convergence.

Answer

Disable vPC on both switches and reconfigure the port channels.

Answer

Reconfigure the vPC domain with a lower priority on the secondary switch.

Answer

Increase the vPC peer-keepalive hold timeout to 5 seconds.

Question 15

A data center network uses VXLAN EVPN for network virtualization. Which component is responsible for advertising MAC addresses and host routes across the fabric?

Accepted Answer

MP-BGP EVPN address family.. In a VXLAN EVPN fabric, the MP-BGP EVPN address family (AFI L2VPN / SAFI EVPN) is the control plane protocol that distributes MAC addresses, IP-to-MAC bindings, and host routes (Type-2 routes) across all VTEPs. This enables each VTEP to build its forwarding table dynamically without relying on data-plane learning or flooding, ensuring optimal east-west traffic forwarding.

Answer

Static routing.

Answer

OSPF.

Answer

VXLAN VTEP.