350-601 Storage Network Practice Test 11 — 15 Questions

Question 1

A new storage administrator is configuring LUN masking on a Cisco MDS switch. The storage array presents two LUNs to the fabric with the same LUN ID (0) but to different target ports. The administrator wants to ensure that a specific host can access both LUNs. The host is connected to a single HBA port. The host will see both target ports in the same zone. After zoning, the host discovers both target ports but only sees the first LUN. The show flogi database shows the host's pWWN with two FC IDs assigned. What is the most likely issue?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

The target LUNs are not masked to the host's pWWN. The host discovers both target ports via FLOGI but only sees the first LUN because the storage array has not been configured to mask the LUNs to the host's pWWN. LUN masking is an array-side access control that determines which initiator WWNs can see which LUNs; without it, the array defaults to presenting only the first LUN (LUN 0) to any initiator. The zone is correctly configured (both target ports are in the same zone and the host sees them), and the LUN ID conflict is irrelevant because the LUNs are on different target ports, so they can share the same LUN ID without conflict.

Answer

The zone is misconfigured

Answer

The host is not configured for multipathing

Answer

There is a LUN ID conflict

Question 2

A storage administrator is troubleshooting a Fibre Channel SAN where initiators cannot log in to a target. The administrator verifies that the VSAN is configured correctly and that zoning is in place. Which two additional checks should be performed to resolve the issue?

Accepted Answer

Confirm that FCID persistence is not enabled with invalid static FCIDs.. In a Fibre Channel SAN, FCID persistence assigns a specific FCID to a device each time it logs in. If an invalid static FCID is configured (e.g., an FCID that conflicts with another device or is outside the allowed range), the initiator may fail to log in because the switch cannot assign the requested address. This is a common cause of login failures even when VSAN and zoning are correctly configured.

Answer

Ensure NPIV is enabled on the F-port.

Answer

Verify the FCoE VLAN ID matches on both ends.

Answer

Check that LUN masking has been applied on the target.

Question 3

A storage administrator has been tasked with integrating a new Cisco MDS 9706 switch into an existing Fibre Channel SAN. The existing SAN consists of two Cisco MDS 9148S switches configured in a VSAN 100 with a single zone set that contains all initiator and target WWPNs. The administrator connects the new switch to one of the existing switches using an ISL and configures the new switch with VSAN 100 and the same zone configuration. The administrator activates the zone set on the new switch and verifies that the ISL is up and both switches see each other's Fibre Channel IDs. However, servers attached to the existing switches still cannot discover the storage targets that are connected to the new switch. The administrator has confirmed that the ISL is operational and that the zone set on the new switch is activated with the correct WWPNs. What should the administrator check next?

Accepted Answer

Verify that the new switch's target-facing interfaces are not in shutdown state.. After confirming the ISL is operational and the zone set is activated with correct WWPNs, the next logical step is to verify that the target-facing interfaces on the new switch are not administratively down. If these interfaces are in shutdown state, the storage targets connected to them will not be accessible from servers on the existing switches. Option A is already confirmed in the scenario. Option B is not necessary because trunk protocol is not required for a single VSAN environment, and the ISL is already up. Option C is unlikely because a domain ID conflict would prevent the ISL from coming up, but the ISL is operational and both switches see each other's FC IDs. Therefore, option D is the correct next step.

Answer

Confirm that the zone set on the new switch is activated and contains correct WWPNs.

Answer

Ensure that the trunk protocol is enabled on the ISL and that allowed VSANs include VSAN 100.

Answer

Check that the new switch's domain ID is unique and not conflicting.

Question 4

An engineer is deploying FCoE on a Cisco Nexus 9000v switch in a converged network. The storage array is connected via native Fibre Channel to an MDS switch, and the MDS is connected to the Nexus using an FCoE link. The engineer creates a virtual Fibre Channel (VFC) interface on the Nexus, binds it to an Ethernet interface, and maps VSAN 200 to VLAN 200. The MDS side has an FCoE port configured and enabled. Servers connected to the Nexus with FCoE initiators can successfully log into the storage targets, but performance is very poor and intermittent. The engineer checks for drops on all interfaces and finds none. The engineer also verifies that the FCoE VLAN is not blocked by spanning tree. What is the most likely cause of the performance issue?

Accepted Answer

The Ethernet interface MTU is set to 1500 instead of 2500.. FCoE requires a jumbo MTU (typically 2500 bytes) to encapsulate Fibre Channel frames without fragmentation. An MTU of 1500 forces fragmentation and reassembly, causing retransmissions and poor performance. Option B is incorrect because the engineer verified that the FCoE VLAN is not blocked by spanning tree. Option C is incorrect because servers can log in, indicating FCoE is enabled on the MDS interface. Option D is incorrect because the VFC binding was already verified as correct.

Answer

The FCoE VLAN is blocking spanning tree.

Answer

The MDS has not enabled FCoE on the interface.

Answer

The VFC interface is not bound to the correct port-channel.

Question 5

A company has two data centers connected via a WAN link using an FCIP tunnel between two Cisco MDS 9700 switches. The FCIP link is configured on a GigabitEthernet port with an MTU of 1500 bytes and uses IPSec for encryption. Recently, storage replication traffic has become slow, and the administrator notices high TCP retransmissions on the FCIP interface. The administrator checks the bandwidth utilization and sees it is only 50% of the link capacity. The storage arrays report no errors or performance issues on their local switches. The administrator also verifies that the FCIP profile is configured correctly and that compression is enabled but not causing any errors. What is the most likely cause of the TCP retransmissions?

Accepted Answer

The TCP window size is too small for the latency.. High TCP retransmissions and 50% utilization on an FCIP link over a high-latency WAN are classic symptoms of a TCP window size that is too small for the latency. When the TCP window is insufficient, the sender cannot keep the pipe full, leading to idle periods and retransmissions when the sender's retransmission timer expires while waiting for acknowledgments. In FCIP, the TCP window should be adjusted based on the bandwidth-delay product. A duplex mismatch would cause collisions and errors, but the absence of reported errors and only 50% utilization suggests the issue is not physical layer. IPSec overhead adds processing delay but rarely causes retransmissions. Compression delays are not significant enough to cause retransmissions. Therefore, option D is correct.

Answer

The WAN link has packet loss due to a duplex mismatch.

Answer

IPSec encryption introduces too much overhead.

Answer

The FCIP profile is configured with compression that is causing delays.

Question 6

An engineer is configuring a new Fibre Channel switch in a Cisco MDS environment. The switch will connect to end devices such as servers and storage arrays. Which two port types will be used on the switch to connect to these end devices?

Accepted Answer

F_port and FL_port. On a Fibre Channel switch, F_ports connect to N_ports on hosts and storage. N_ports are on end devices, not on the switch. E_ports are for ISLs between switches. NP_ports are used in NPV mode.

Answer

NP_port and VF_port

Answer

E_port and TE_port

Answer

N_port and NL_port

Question 7

A storage administrator needs to isolate Fibre Channel traffic between two departments in a data center using a single MDS switch. The administrator decides to create separate VSANs. Which statement about VSANs is true?

Accepted Answer

VSANs provide isolation similar to VLANs in Ethernet networks.. VSANs provide isolation similar to VLANs in Ethernet. Each VSAN has its own fabric services and does not share traffic with other VSANs.

Answer

VSANs share the same fabric services across all VSANs.

Answer

VSANs require separate physical interfaces for each VSAN.

Answer

VSANs cannot be used with FCoE.

Question 8

An engineer is designing an NPV deployment to scale the number of hosts connected to a Fibre Channel fabric. In NPV mode, which port type is used on the NPV switch to connect to the core switch?

Accepted Answer

NP_port. In NPV mode, the edge switch uses NP_ports to connect to the core switch's F_ports. NP_ports behave like N_ports and log in to the core fabric.

Answer

VN_port

Answer

E_port

Answer

F_port

Question 9

A company uses hard zoning based on World Wide Names (WWNs) to control access between servers and storage arrays. An administrator needs to add a new server with WWPN 50:00:00:00:00:00:01:23 to the zone. What is an advantage of hard zoning over soft zoning?

Accepted Answer

Hard zoning is enforced by the switch hardware and provides better security.. Hard zoning uses the FC address (or WWN) and is enforced by the switch ASIC, providing security even if a device spoofs its WWN? Actually, hard zoning by WWN uses the WWN to assign FC addresses and enforces zoning at the hardware level, while soft zoning relies on name server queries and can be bypassed. Hard zoning provides better security.

Answer

Hard zoning requires less configuration effort.

Answer

Hard zoning allows devices to communicate across VSANs.

Answer

Hard zoning prevents unauthorized devices from accessing the fabric even if they spoof a WWN.

Question 10

Which Fibre Channel addressing component uniquely identifies a port on a storage array and is used for zoning and target identification?

Accepted Answer

WWPN. A WWPN (World Wide Port Name) is a globally unique 64-bit identifier assigned to each Fibre Channel port. It is used for zoning and target identification.

Answer

FCID

Answer

WWN

Answer

WWNN

Question 11

An engineer configures an ISL between two MDS switches using E_ports. To utilize all available bandwidth, the engineer wants to bundle four physical links into a single logical link. Which technology should be used?

Accepted Answer

Fibre Channel PortChannel. Fibre Channel PortChannels aggregate multiple physical links into one logical link, providing increased bandwidth and redundancy. This is similar to Ethernet port channels.

Answer

NPV mode

Answer

FCoE trunking

Answer

EISL trunking

Question 12

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 DCB mechanism that provides per-priority pause to prevent frame loss, ensuring lossless delivery for FCoE traffic.

Answer

Data Center Bridging Exchange (DCBX)

Answer

FCoE Initialization Protocol (FIP)

Answer

Enhanced Transmission Selection (ETS)

Question 13

An iSCSI storage array is configured to support multipath I/O (MPIO) for high availability. The administrator needs to configure the initiator to use multiple network paths. What must be ensured for MPIO to work correctly?

Accepted Answer

The initiator must have multiple network interfaces and the storage must support multiple connections to the same LUN.. For MPIO to function, the initiator must have multiple network interfaces and the storage array must present the same LUNs via multiple target portal groups, each accessible via different IP addresses.

Answer

CHAP authentication must be disabled for MPIO.

Answer

All paths must use the same IP address on the initiator.

Answer

The storage array must present each LUN with a different LUN ID on each path.

Question 14

Which RAID level provides striping with parity and can tolerate a single disk failure while offering higher storage efficiency than RAID 1?

Accepted Answer

RAID 5. RAID 5 uses block-level striping with distributed parity, allowing recovery from a single disk failure with good storage efficiency (one disk worth of parity).

Answer

RAID 0

Answer

RAID 6

Answer

RAID 1

Question 15

A storage administrator is configuring synchronous replication between two storage arrays over a Fibre Channel link. Which characteristic best describes synchronous replication?

Accepted Answer

The write is acknowledged to the host only after data is written to both primary and secondary.. Synchronous replication writes data to both the primary and secondary storage before acknowledging the write to the host, ensuring zero data loss but increasing latency.

Answer

Data is written to the primary and then asynchronously to the secondary, reducing latency.

Answer

The secondary storage is used only for backup and is not actively updated.

Answer

Data is written to the primary and later replicated based on a schedule.