350-601 Practice Test 32 — 15 Questions

Question 1

Which TWO of the following Fibre Channel port types are used to connect end devices such as hosts or storage?

Accepted Answer

N port. (N port) is correct because an N_port (Node port) is the Fibre Channel port type used on end devices such as hosts (HBAs) or storage controllers to connect to a Fibre Channel switch. Option D (F port) is correct because an F_port (Fabric port) is the switch-side port that connects to an N_port, forming a point-to-point link between the end device and the fabric. Together, N_port and F_port enable standard fabric login (FLOGI) and frame exchange.

Answer

FL port

Answer

E port

Answer

NP port

Question 2

Refer to the exhibit. A server with WWPN 10:00:00:00:c9:2b:1a:5f is zoned to two storage ports in zone Server1_Storage1 and to one storage port in zone Server1_Storage2. The server can access the LUNs through the first zone but not through the second. What is the most likely cause?

Accepted Answer

The second zone does not include the second storage controller's port. The server can access LUNs through zone Server1_Storage1 because both storage ports in that zone are from the same storage controller or are properly configured for multipathing. However, zone Server1_Storage2 contains only one storage port (20:00:00:00:c9:2b:1a:6c), and if that port belongs to a different storage controller that is not zoned with the server's WWPN correctly, or if the second storage controller's port is missing from the zone, the server cannot discover or access LUNs through that path. In Fibre Channel zoning, each zone must include the initiator and at least one target port from the storage controller that owns the LUNs; if the second zone omits the required storage controller port, access fails.

Answer

The storage port 20:00:00:00:c9:2b:1a:6c is in a different VSAN

Answer

The zone set has not been activated

Answer

The server is not allowed to be in multiple zones

Question 3

A network engineer is troubleshooting an OSPF adjacency issue between two Nexus switches. The neighbors are stuck in the EXSTART state. What is the most likely cause?

Accepted Answer

MTU mismatch. When OSPF neighbors are stuck in the EXSTART state, the most common cause is an MTU mismatch. In EXSTART, the routers exchange Database Description (DBD) packets, which must be no larger than the interface MTU. If one interface has a smaller MTU, the DBD packet is dropped, preventing the adjacency from progressing to the Exchange state. Cisco Nexus switches default to an MTU of 1500 bytes, but any mismatch will cause this issue.

Answer

Hold timer mismatch

Answer

Incorrect area ID

Answer

Duplicate router ID

Question 4

Which THREE factors should be considered when designing an FCoE SAN to avoid traffic loss? (Choose three.)

Accepted Answer

Enable priority flow control (PFC) on all FCoE-enabled interfaces.. Priority Flow Control (PFC) is essential in an FCoE SAN because it provides a lossless Ethernet fabric by pausing traffic on a per-priority basis. Without PFC, standard Ethernet congestion mechanisms would drop FCoE frames, which violates the lossless requirement of Fibre Channel traffic. Enabling PFC on all FCoE-enabled interfaces ensures that buffer credits are managed correctly and no frames are discarded due to congestion.

Answer

Use standard Ethernet cut-through switching for all FCoE traffic.

Answer

Disable the FIP snooping feature to reduce latency.

Question 5

An engineer is troubleshooting a VXLAN network where traffic between two VTEPs in the same VNI is not being forwarded. The underlay network is operational and IP connectivity exists between the VTEPs. Which two actions should the engineer take to verify the VXLAN configuration?

Accepted Answer

Verify that the NVE interface is configured with the correct source-interface.. The NVE interface's source-interface (typically a loopback) defines the local VTEP IP address used for VXLAN encapsulation. If this source-interface is misconfigured or not reachable from the remote VTEP, VXLAN packets will not be sourced from the correct IP, breaking traffic forwarding even when underlay IP connectivity exists.

Answer

Verify that the multicast group for BUM traffic is reachable.

Answer

Verify that the VXLAN tunnel endpoint IP addresses are in the same subnet.

Answer

Verify that the VXLAN routing table is populated correctly.

Question 6

In a spine-leaf architecture, the oversubscription ratio between leaf switches and spine switches is 3:1. Each leaf has 48 x 10G server ports and 4 x 40G uplinks to the spine. What is the oversubscription ratio at the leaf level?

Accepted Answer

3:1. The oversubscription ratio at the leaf level is calculated by comparing the total bandwidth of the server-facing ports to the total bandwidth of the uplink ports. Each leaf has 48 x 10G server ports (480 Gbps) and 4 x 40G uplinks (160 Gbps). The ratio is 480:160, which simplifies to 3:1. This matches the given spine-leaf oversubscription ratio, confirming that the leaf-level ratio is 3:1.

Answer

1:1

Answer

4:1

Answer

2:1

Question 7

An engineer is troubleshooting a BGP EVPN issue where leaf switches are not learning remote MAC addresses. The underlay is reachable and BGP sessions are established. What is a likely cause?

Accepted Answer

Missing 'address-family l2vpn evpn' under the BGP neighbor configuration. Even when the underlay is reachable and BGP sessions are established, the BGP EVPN control plane requires the 'address-family l2vpn evpn' to be explicitly activated under the BGP neighbor configuration. Without this, the leaf switch will not exchange EVPN routes (Type-2 MAC/IP advertisement routes) with its peers, so remote MAC addresses are never learned. This is a common misconfiguration because BGP sessions may appear up but are not carrying the necessary EVPN address family.

Answer

NVE interface not enabled

Answer

Incorrect VNI configuration

Answer

MTU mismatch on the underlay

Question 8

A large enterprise runs a Cisco HyperFlex cluster with three nodes, managed through Intersight. After a planned maintenance window, the administrator notices that one of the nodes is in a 'Degraded' state and the cluster is running in 'Read-Only' mode. The administrator checks the Intersight dashboard and sees that the node's disk status shows 'Missing' for one of the SSDs. The administrator also notices that the node's IP address is reachable and the ESXi host is still operational. The administrator reviews the cluster health and sees no other alerts. What is the most likely root cause and the recommended action to restore full cluster health?

Accepted Answer

The SSD failed due to a hardware fault; the administrator should replace the SSD and then use Intersight to rebuild the node's disk group.. A is correct because a missing SSD in a HyperFlex node triggers a 'Degraded' state and forces the cluster into 'Read-Only' mode to prevent data corruption. Since the node's IP is reachable and ESXi is operational, the issue is a hardware fault, not a network or CVM problem. Replacing the SSD and using Intersight to rebuild the disk group restores the node's storage capacity and cluster health.

Answer

The node lost connectivity to the cluster's internal network; the administrator should check the network switches and restore the VLAN configuration.

Answer

The node's controller VM (stCVM) is not running; the administrator should reboot the node and wait for the CVM to start.

Answer

The cluster has split-brain due to a partition; the administrator should force a cluster consensus by shutting down the other nodes.

Question 9

Which three components are required to boot a UCS blade server from SAN? (Choose three.)

Accepted Answer

SAN boot target LUN. A SAN boot target LUN is required because the UCS blade server needs a specific logical unit number (LUN) on the storage array from which to boot the operating system. Without a designated boot LUN, the server has no target storage device to load the OS from over the Fibre Channel (FC) or FCoE SAN fabric.

Answer

iSCSI adapter

Answer

vNIC

Question 10

A data center design requires Layer 2 extension between two sites using OTV. The network engineer notices that MAC addresses from Site A are not learned at Site B. OTV adjacency is up, and both sites have the same overlay interface configured. Which configuration issue is most likely the cause?

Accepted Answer

The site VLAN is not allowed on the OTV join interface.. D is correct because the OTV join interface must have the site VLAN allowed; if the site VLAN is not permitted on the join interface, the OTV edge device cannot send or receive encapsulated traffic for that VLAN, preventing MAC address learning between sites even though the OTV adjacency is up.

Answer

The OTV control group is misconfigured on one side.

Answer

The spanning tree root bridge is different at each site.

Answer

The multicast group range for the overlay does not match.

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

Which NX-OS command is used to display the consistency status of Virtual Port Channel (vPC) parameters across both vPC peers?

Accepted Answer

show vpc consistency-parameters. The 'show vpc consistency-parameters' command is specifically designed to verify that all required VPC configuration parameters (such as allowed VLANs, STP settings, and port-channel modes) are identical on both VPC peers. Inconsistent parameters can cause VPC traffic disruption or failover issues, and this command provides a detailed per-interface or global consistency check.

Answer

show vpc peer-keepalive

Answer

show vpc brief

Answer

show running-config vpc

Question 13

A network engineer is designing a spine-leaf fabric with oversubscription ratio of 3:1. Each leaf switch uses 40 Gbps uplinks to the spine and has 48 x 10 Gbps server ports. How many spine links are needed per leaf to achieve the target oversubscription?

Accepted Answer

4. The oversubscription ratio is the ratio of server-facing bandwidth to spine-facing bandwidth. Each leaf has 48 x 10 Gbps = 480 Gbps of server-facing capacity. To achieve a 3:1 oversubscription ratio, the spine-facing bandwidth must be 480 Gbps / 3 = 160 Gbps. Since each uplink is 40 Gbps, you need 160 / 40 = 4 spine links per leaf.

Answer

3

Answer

2

Answer

5

Question 14

Refer to the exhibit. An engineer notices that traffic is not load-balanced across all four links. What is the most likely cause?

Accepted Answer

The load-balancing algorithm is based on source-dest-id, which may not evenly distribute traffic.. The load-balancing algorithm for Fibre Channel port channels uses source-dest-id (SID and DID) by default. If the traffic flows are between a small number of source-destination pairs, the hash results will map most flows to the same link, preventing even distribution across all four links. This is a common cause of perceived load imbalance even when all links are operational.

Answer

The minimum links set to 2 prevents load balancing.

Answer

LACP is not supported on Fibre Channel.

Answer

The port channel is in admin down state.

Answer

The links are not in the same VSAN.

Question 15

A network engineer is configuring OSPF on a Nexus switch. To ensure fast convergence in case of a link failure, which OSPF feature should be enabled?

Accepted Answer

OSPF Fast Hello. OSPF Fast Hello (B) is the correct feature to enable for fast convergence on a Nexus switch because it reduces the dead interval to less than one second by sending Hello packets at sub-second intervals (e.g., every 333 ms for a 1-second dead interval). This allows OSPF neighbors to detect a link failure much faster than the default 40-second dead interval on broadcast networks, triggering quicker SPF recalculation and route convergence.

Answer

OSPF authentication

Answer

OSPF stub area

Answer

OSPF route summarization