Free Netapp NS0-162 Practice Exam with Questions & Answers | Set: 3

The security method that would be used to authenticate targets and initiators in an ISCSI environment is CHAP. CHAP stands for Challenge Handshake Authentication Protocol, and it is a method that validates the identity of targets and initiators during the initial link. CHAP uses a shared secret (a password) that is exchanged between the target and the initiator in a challenge-response manner. CHAP can be used in both one-way and mutual modes, depending on whether both parties need to authenticate each other or not. The other options are not valid for this scenario because:

• NIS is a network information service that provides centralized management of user accounts and host names, but it does not provide authentication for ISCSI devices.
• LDAP is a protocol for accessing and managing directory services, such as user and group information, but it does not provide authentication for ISCSI devices.
• /etc/hosts is a file that maps host names to IP addresses, but it does not provide authentication for ISCSI devices. References :- How iSCSI authentication works, Securing iSCSI Devices, Configure iSCSI authentication

NVMe is a protocol that enables fast and efficient access to storage devices over a network. NVMe uses NVM Express over Fabrics (NVMe-oF) to transport commands and data between hosts and storage systems. NVMe-oF uses NVM subsystems, which are logical containers for one or more NVMe namespaces. A namespace is a logical unit of storage that can be accessed by a host. A host can discover and connect to an NVM subsystem by using a unique NVM subsystem identifier (NQN). ONTAP supports NVMe/FC and NVMe/RoCE as the transport protocols for NVMe-oF. ONTAP maps NVMe namespaces to LUNs and NQNs to subsystems. ONTAP also maps initiator groups to subsystems to control host access to namespaces. References :- NVMe Overview, Implementing and Configuring Modern SANs with NVMe/FC, NVMe-oF host configuration for RHEL 8.9 with ONTAP

The problem of being unable to upload large files or migrate VMs to the new NFS datastore is likely caused by a mismatch in the maximum transmission unit (MTU) settings between the network switches, the ONTAP cluster, and the vSphere hosts. The exhibit shows that the broadcast domain for the NFS LIF has an MTU of 9,000 bytes, which means that it is configured for jumbo frames. However, the default MTU for the VMkernel ports on the vSphere hosts is 1,500 bytes, which means that they are not configured for jumbo frames. This can result in packet fragmentation, dropped packets, or reduced performance. To correct the problem, the MTU of the VMkernel ports on the vSphere hosts should be changed to 9,000 bytes to match the MTU of the broadcast domain and the network switches. This will enable the vSphere hosts to send and receive jumbo frames and improve the NFS performance. References :- ProvisionNFS storage for VMware datastores, vSphere NFS datastore - Version 3 with ONTAP, Configure jumbo frames for VMkernel networking

To find the MAC address of the offline interface e0c, you need to look at the output of the network port show command for Node1, which shows the MAC address and the health status of each port. The MAC address of e0c is 00:a0:98:f1:2e:b2 and its health status is degraded, indicating that it has gone offline. This is the MAC address that you would supply to the engineering team.

• The other MAC addresses are not correct, as they belong to different interfaces or nodes. The MAC address of e0d is 00:a0:98:f1:2e:b3 and its health status is healthy, indicating that it is still online. The MAC address of a0a is 02:a0:98:f1:2e:be and it is the active MAC address of the ifgrp that includes e0c and e0d. The MAC address of ala is 02:a0:98:f1:21:88 and it is the active MAC address of the ifgrp on Node2, which is not relevant to the question. References :- network port show - NetApp, network interface show - NetApp, How does a VIF MAC address get assigned in ONTAP 7?.

 The problem is that the NFS export policy only allows access to the IP range of 192.168.10.11-12, which does not include HOST 3’s IP address of 192.168.10.13. Therefore, the ESXi host cannot mount the NFS datastore. To solve the problem, you need to add HOST 3’s IP address to the NFS export policy, or modify the IP range to include it. This will grant the ESXi host the permission to access the NFS datastore. References :- ONTAP 9 Network Management Guide, ONTAP 9 NFS Reference, Troubleshooting NFS datastore connectivity issues (1003967)

FC switch zoning is the process of assigning a set of WWPNs to a zone, which is a group of ports that can communicate with each other. Zoning is required for FC SAN hosts to access LUNs on the SVM. If the zoning is not done correctly, the host might not be able to discover the LUNs or might see LUNs that belong to other hosts. Therefore, FC switch zoning is a possible cause of the issue with SVM eplc_fcp when mapping a namespace to a host. References :- Configure an SVM for FC, Configure FC protocol and FCoE protocol on SVMs with System Manager