350-601 Practice Test 17 — 15 Questions

Question 1

Which YANG-based protocol uses RESTful operations (GET, POST, PUT, DELETE) over HTTP/HTTPS for network configuration?

Accepted Answer

RESTCONF. RESTCONF (RFC 8040) is a RESTful protocol that uses HTTP methods and YANG data models.

Answer

SNMP

Answer

NETCONF

Answer

gRPC

Question 2

A UCS administrator is deploying a 3-node HyperFlex cluster with vSphere. Each node has a single vNIC for management and two vNICs for storage data traffic. During the cluster creation, the storage vNIC MTU must be configured. What is the recommended MTU value for the storage data vNICs in HyperFlex?

Accepted Answer

9000. C is correct because HyperFlex storage data vNICs require jumbo frame support to optimize storage traffic performance. The recommended MTU value for these vNICs is 9000, which allows larger packet sizes and reduces CPU overhead for storage I/O operations. This value is consistent with Cisco's best practices for HyperFlex cluster deployments.

Answer

1500

Answer

9216

Answer

4096

Question 3

In an ACI fabric, an automation engineer needs to create a new tenant with an application profile and EPG using the APIC REST API. The engineer decides to use the Cobra SDK for Python. Which statement about the Cobra SDK is true?

Accepted Answer

Cobra SDK provides Python classes for each object in the ACI MIT.. Cobra SDK provides Python bindings for the APIC REST API, allowing direct manipulation of the MIT.

Answer

Cobra SDK only supports JSON format for payloads.

Answer

Cobra SDK uses NETCONF to communicate with the APIC.

Answer

Cobra SDK requires the acitoolkit library to be installed separately.

Question 4

An engineer is configuring iSCSI multipath I/O (MPIO) on a Windows server connected to a storage array. The goal is to provide load balancing and failover. What must be configured on the storage side to support MPIO?

Accepted Answer

Multiple iSCSI target IP addresses presenting the same LUN. To support MPIO, the storage array must present the same LUN through multiple iSCSI target IP addresses (or portals). This allows the initiator to establish multiple paths to the same LUN, enabling load balancing and failover.

Answer

Jumbo frames

Answer

CHAP authentication

Answer

Thin provisioning

Question 5

An engineer is troubleshooting BGP EVPN control plane. They issue 'show bgp l2vpn evpn' and see Type-3 routes but no Type-2 routes for any VNI. Which condition is most likely?

Accepted Answer

The VTEP has not learned any MAC addresses. Type-3 routes (Inclusive Multicast Ethernet Tag routes) are generated automatically when an EVPN VNI is configured, regardless of MAC learning. Type-2 routes (MAC/IP Advertisement routes) are only generated after the VTEP learns MAC addresses from data-plane traffic or from local endpoints. The absence of Type-2 routes with Type-3 present indicates the VTEP has not yet learned any MAC addresses for that VNI.

Answer

The overlay VNI is not mapped to a VLAN

Answer

The BGP neighbor is not from the same AS

Answer

The EVPN address-family is not enabled

Question 6

A storage network engineer notices high buffer credit starvation counters on an inter-switch link. What is the most effective solution to reduce this issue?

Accepted Answer

Increase the number of buffer credits on the ISL.. High buffer credit starvation counters on an inter-switch link (ISL) indicate that the switch is running out of buffer credits to send frames, causing pauses in transmission. Increasing the number of buffer credits on the ISL directly addresses this by providing more credit pool for the link, allowing the switch to send more frames before needing acknowledgment, thus reducing starvation and improving throughput.

Answer

Change the ISL port mode from E to F.

Answer

Reduce the ISL speed to 1 Gbps.

Answer

Enable QoS to prioritize buffer credit recovery.

Question 7

Which of the following is a benefit of using Fibre Channel over Ethernet (FCoE) in a data center?

Accepted Answer

It reduces cabling complexity by using a unified fabric.. FCoE encapsulates Fibre Channel frames over Ethernet networks, allowing storage and data traffic to share the same physical infrastructure. This consolidation reduces cabling complexity and the number of required switches, adapters, and power/cooling overhead, which is the core benefit of a unified fabric.

Answer

It increases the maximum distance of Fibre Channel links.

Answer

It provides native Fibre Channel security.

Answer

It eliminates the need for zoning.

Question 8

Refer to the exhibit. An engineer sees this error on a Cisco MDS switch. What is the best action to resolve the issue?

Accepted Answer

Assign a different domain ID to one of the switches.. The error indicates a domain ID conflict between two switches in the same VSAN. In Fibre Channel fabrics, each switch must have a unique domain ID to build a correct forwarding table. Assigning a different domain ID to one of the switches resolves the conflict without disrupting the fabric.

Answer

Reload both switches to reset domain IDs.

Answer

Shut and no shut the ISL between the switches.

Answer

Change the VSAN on one of the switches.

Question 9

In a Fibre Channel fabric using NPV mode, what is the role of the NP-port on the edge switch?

Accepted Answer

It connects to a core switch's F-port and proxies host logins. In NPV (N_Port Virtualization) mode, the edge switch's NP-port connects to a core switch's F-port and proxies host logins, allowing the edge switch to appear as an N-port to the core. This enables the edge switch to forward fabric logins from hosts without consuming domain IDs in the core fabric. The NP-port acts as both an N-port and a proxy, aggregating multiple host N-port logins.

Answer

It is used to connect to storage arrays

Answer

It is used for VSAN trunking

Answer

It acts as an E-port for ISL connectivity

Question 10

An engineer needs to isolate storage traffic for different departments using Fibre Channel switches. Which technology should be used?

Accepted Answer

VSAN (Virtual SAN). VSAN (Virtual SAN) is the correct technology because it allows the engineer to create multiple isolated virtual SANs on a single physical Fibre Channel fabric. Each VSAN operates as an independent SAN with its own fabric services, security policies, and traffic isolation, enabling different departments to have dedicated storage traffic without interference.

Answer

Zoning

Answer

Trunking

Answer

NPV (N-Port Virtualization)

Question 11

A network engineer is deploying FCoE in a top-of-rack design. Which statement about the required lossless Ethernet fabric is correct?

Accepted Answer

Priority Flow Control (PFC) must be enabled to create lossless CoS. FCoE requires a lossless Ethernet fabric to prevent frame drops, which would corrupt Fibre Channel traffic. Priority Flow Control (PFC), defined in IEEE 802.1Qbb, provides per-priority pause mechanisms to create lossless CoS (Class of Service) queues, ensuring no frames are lost due to congestion. Without PFC, standard Ethernet's best-effort delivery would cause frame drops, breaking FCoE's reliability.

Answer

Data Center Bridging Exchange (DCBX) automatically enables PFC when FCoE is configured

Answer

FCoE uses VLAN 1002 by default for all traffic

Answer

FCoE frames are limited to 1500 bytes to avoid fragmentation

Question 12

In an FCoE deployment, a storage administrator needs to ensure that FCoE traffic is carried over a dedicated VLAN. Which configuration is required on a Cisco Nexus switch?

Accepted Answer

Enable FIP snooping and map the FCoE VLAN to a VSAN.. In an FCoE deployment, FIP snooping is required on the Cisco Nexus switch to enforce that only FCoE traffic is carried over a dedicated VLAN. The FCoE VLAN must be mapped to a VSAN to ensure proper isolation and forwarding of storage traffic. This configuration prevents unauthorized devices from injecting FCoE frames and maintains the integrity of the storage network.

Answer

Configure the VLAN as a private VLAN.

Answer

Assign the VLAN as an access VLAN to the interface.

Answer

Configure the VLAN as a native VLAN on the FCoE interface.

Question 13

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 14

A Cisco MDS switch is connected to a Fibre Channel storage array and a host. The host cannot see the storage LUNs. The 'show flogi database' command on the MDS shows the host's WWPN, but the 'show fcns database' does not show the storage target. What is the most likely cause?

Accepted Answer

The storage target is not logged into the fabric.. The 'show flogi database' command displays all devices that have completed the Fabric Login (FLOGI) process, which the host has done. However, the 'show fcns database' command lists only devices that have registered with the Fabric Name Server (via FDISC or FLOGI with PLOGI). Since the storage target is not in the name server database, it means the target has not logged into the fabric (or has not registered its FC-4 type/SCSI features), preventing the host from discovering its LUNs. This is the most likely cause because the host can see its own WWPN in the FLOGI database but cannot see the target in the FCNS database.

Answer

The zone configuration is incorrect.

Answer

The host and target are in different VSANs.

Answer

The host is not in the name server database.

Question 15

Refer to the exhibit. An engineer is configuring a server-facing interface on a Nexus switch. The server is running VMware ESXi with multiple virtual machines in VLANs 10, 20, and 30. After applying the configuration, the ESXi host reports that it cannot communicate on VLAN 30. Which configuration change should be made?

Accepted Answer

Create VLAN 30 in the global VLAN database. VLAN 30 must exist in the global VLAN database before it can be used on any interface. Even though the interface configuration allows VLAN 30 as a trunked VLAN, the switch will not forward traffic for a VLAN that has not been created globally. Without the 'vlan 30' command in global configuration mode, the VLAN is not present in the switch's VLAN database, and the interface will not pass traffic for that VLAN.

Answer

Remove the 'spanning-tree port type edge trunk' command

Answer

Change the native VLAN to 30

Answer

Configure the port as an access port in VLAN 30