350-601 Practice Test 40 — 15 Questions

Question 1

In a data center running MST, which region configuration parameter must match on all switches for them to be part of the same region?

Accepted Answer

Region name, revision number, and VLAN-to-instance mapping. In Multiple Spanning Tree (MST), switches must agree on three parameters to belong to the same MST region: the region name, the revision number, and the VLAN-to-instance mapping. These parameters are exchanged in MST BPDUs, and if any differ, the switches treat each other as being in different regions, which can lead to suboptimal or incorrect spanning-tree behavior.

Answer

Spanning-tree mode

Answer

Bridge priority

Answer

Max-age and hello time

Question 2

A data center network uses MST to interoperate with a legacy switch that supports only RSTP. Which MST configuration parameter must match between the MST region and the legacy switch?

Accepted Answer

No parameters need to match; the boundary port runs RSTP.. When an MST region connects to a legacy switch running only RSTP, the boundary port on the MST switch automatically runs RSTP to interoperate. No MST-specific parameters (region name, revision number, or VLAN-to-instance mapping) need to match because the legacy switch is not part of the MST region; it simply runs RSTP on the link.

Answer

Region name

Answer

Revision number

Answer

VLAN-to-instance mapping

Question 3

Refer to the exhibit. An engineer notices intermittent packet loss on interface Ethernet 1/1 of the Fabric Interconnect. Based on the transceiver statistics shown, which condition is the most likely cause?

Accepted Answer

The receive power is below the low warning threshold.. The exhibit shows that the receive power is -16.3 dBm, which is below the low warning threshold of -13.3 dBm. This indicates the incoming optical signal is too weak, causing intermittent packet loss due to bit errors or link flaps. The transceiver statistics confirm that the receive power is the only parameter breaching its threshold, making it the most likely cause.

Answer

The supply voltage is out of range.

Answer

The transmit power is too low.

Answer

The transceiver temperature is too high.

Question 4

In the context of ACI L3Out, which object is used to advertise external networks into the ACI fabric and is associated with a VRF?

Accepted Answer

L3Out. In ACI, an L3Out is the logical construct that provides connectivity from the ACI fabric to external Layer 3 networks. It is associated with a VRF to define the routing context, and it is the object under which external networks are advertised into the fabric via route redistribution or static routes. The L3Out contains the external EPGs and the protocol profiles (e.g., OSPF, BGP, EIGRP) that control the advertisement.

Answer

Bridge Domain

Answer

Contract

Answer

External EPG

Question 5

A Nexus switch is experiencing high CPU utilization due to control plane traffic. Which feature should be configured to protect the CPU?

Accepted Answer

Control Plane Policing. CoPP (Control Plane Policing) rate-limits control plane traffic.

Answer

IP Source Guard

Answer

Dynamic ARP Inspection

Answer

DHCP snooping

Question 6

A large enterprise data center is deploying a new application using Cisco ACI with a multi-pod design. The application requires low-latency communication between servers in different pods. The network team has configured the ACI fabric with two pods, each connected via inter-pod network (IPN) switches. After deployment, the application experiences intermittent latency spikes and packet loss. The APIC health scores remain high but the latency issue persists. The team has verified the underlay IP connectivity and MTU settings. What is the most likely cause of the latency issues?

Accepted Answer

The CoS settings for the application traffic are not properly mapped to the appropriate queue on the IPN switches.. In a Cisco ACI multi-pod design, the IPN switches must properly trust and map the CoS values from the ACI fabric to the appropriate egress queues. If the CoS markings are not correctly configured on the IPN switches, application traffic can experience buffer drops and latency spikes even when the underlay has sufficient bandwidth and the APIC health scores are high. This is a common misconfiguration because the IPN switches are Layer 3 devices that require explicit QoS policies to preserve the ACI fabric's priority handling.

Answer

The application servers are using different VLANs that are not stretched between pods.

Answer

The IPN switches are using a shared link aggregation group that is causing traffic congestion.

Answer

The inter-pod network is not configured with enough bandwidth due to oversubscription.

Question 7

In a Cisco MDS switch, what is the effect of the command 'fcdomain restart vsan 100'?

Accepted Answer

It causes a fabric reconfiguration, which may disrupt traffic.. The 'fcdomain restart vsan 100' command triggers a fabric reconfiguration (RCF) on VSAN 100. This process resets the principal switch selection and domain ID distribution, causing all switches in the VSAN to renegotiate their roles and domain IDs, which disrupts existing Fibre Channel traffic during the reconfiguration.

Answer

It enables NPV mode on VSAN 100.

Answer

It clears the zone configuration for VSAN 100.

Answer

It reboots the switch.

Question 8

An engineer is deploying FCoE in a data center and must ensure lossless transport for Fibre Channel traffic over Ethernet. The engineer configures Priority Flow Control (PFC) on the DCB-enabled switches. However, FCoE initialization fails. Which additional DCB feature is required to enable FCoE devices to discover and negotiate PFC settings with the switch?

Accepted Answer

DCBX (Data Center Bridging Exchange). DCBX (Data Center Bridging Exchange) is used to exchange DCB parameters between peers, including PFC and ETS. FIP uses DCBX to discover FCoE-capable switches and negotiate PFC.

Answer

CN (Congestion Notification)

Answer

ETS (Enhanced Transmission Selection)

Answer

QoS (Quality of Service)

Question 9

Refer to the exhibit. An Ansible playbook targeting an NX-OS switch fails with this error. What is the most likely cause?

Accepted Answer

The password is incorrect. The error message indicates an authentication failure during the SSH connection from Ansible to the NX-OS switch. Since Ansible uses SSH to execute tasks, a 'Permission denied' error most commonly points to incorrect credentials. The playbook likely specifies the wrong password for the given username, causing the SSH session to be rejected.

Answer

The username is incorrect

Answer

SSH is not enabled on the switch

Answer

The Ansible version is incompatible with the switch

Question 10

An engineer is designing a UCS Mini deployment for a remote office. The chassis will contain four blade servers. Each server needs two 10GbE connections for data and one 1GbE for management. What is the minimum number of fabric interconnects required?

Accepted Answer

One. A single UCS Mini fabric interconnect (FI) can provide both data and management connectivity for up to eight blade servers in a single chassis. Each blade server requires two 10GbE data connections (from the integrated VIC) and one 1GbE management connection (from the Cisco Integrated Management Controller, or CIMC). The FI aggregates these connections internally, so one FI is sufficient for a four-server deployment, as UCS Mini supports a single FI configuration for non-redundant setups.

Answer

Three

Answer

Four

Answer

Two

Question 11

A network engineer is troubleshooting a slow backup performance between a backup server and a tape library connected via FC. The backup server is connected to a Cisco MDS switch at 8 Gbps, and the tape library is connected at 4 Gbps. The backup job is using hardware compression. Which factor is most likely limiting performance?

Accepted Answer

Port speed mismatch between the server and tape library. The backup server is connected at 8 Gbps while the tape library is connected at 4 Gbps. In Fibre Channel, the link speed is negotiated per port, and the end-to‑end flow is limited by the slowest link in the path. Even though the server can transmit at 8 Gbps, the tape library can only receive at 4 Gbps, creating a bottleneck that caps the backup throughput. Hardware compression on the tape library does not cause this speed mismatch; it actually reduces the amount of data written to tape, but the physical link rate remains the limiting factor.

Answer

Insufficient buffer credits on the MDS switch

Answer

Hardware compression on the tape library

Answer

Half-duplex mode on the FC link

Question 12

In a HyperFlex cluster, what is the function of the witness VM?

Accepted Answer

To act as a tie-breaker for cluster quorum. The witness VM in a HyperFlex cluster is a lightweight virtual machine that participates in the cluster's quorum process. It provides a tie-breaking vote when the cluster experiences a split-brain scenario, ensuring that only one side of the cluster remains operational and data integrity is maintained. Without the witness, the cluster could become unavailable if an even number of nodes lose connectivity.

Answer

To store backup copies of all cluster data

Answer

To offload data replication processing

Answer

To provide a centralized management interface

Question 13

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 combines mirroring and striping. With 12 disks, there are 6 mirrored pairs. Data is lost only if both disks in the same mirror fail. Therefore, as long as no more than one disk per mirror fails, up to 6 disks can fail simultaneously without data loss. The phrase 'worst-case scenario' often confuses candidates into thinking only 1 failure is tolerable, but the question asks for the maximum number that can fail without data loss, which is 6.

Answer

11

Answer

2

Answer

1

Question 14

An engineer is configuring a VXLAN EVPN fabric. Which address family must be enabled under BGP to exchange MAC/VTEP reachability information?

Accepted Answer

address-family l2vpn evpn. In a VXLAN EVPN fabric, BGP is used as the control plane to exchange MAC and VTEP reachability information. The correct address family for this is 'l2vpn evpn' (address-family l2vpn evpn), which carries EVPN NLRI (Network Layer Reachability Information) as defined in RFC 7432. This enables the distribution of MAC addresses, IP-to-MAC bindings, and VTEP endpoints across the overlay network.

Answer

address-family ipv4 unicast

Answer

address-family l2vpn vpls

Answer

address-family vpnv4

Question 15

In a UCS B-series chassis, which component provides the management connectivity between the blades and the Fabric Interconnects?

Accepted Answer

IOM (Input/Output Module). The Input/Output Module (IOM) in a UCS B-series chassis provides the management connectivity between the blades and the Fabric Interconnects. It aggregates all blade traffic, including management traffic (such as CIMC communications), and forwards it to the Fabric Interconnects over the chassis backplane. Without the IOM, the blades would have no path to the Fabric Interconnects for management or data-plane operations.

Answer

CIMC

Answer

UCS Manager

Answer

Blade midplane