An administrator of a secure environment needs to add an iSCSI target to a new ESXi host using the vSphere client. The administrator has configured discovery and performed a rescan operation, but the iSCSI target does NOT appear.
Which action should the administrator take for the target to appear in the vSphere client?
A. Configure appropriate CHAP authentication settings
B. Bind a VMkernel port to the iSCSI initiator
C. Configure Jumbo Frames prior to adding iSCSI targets
D. Enable iSCSI in a vSphere Distributed Switch configuration
Correct Answer: A
Explanation/Reference:
Explanation:
This question states that we have a secure environment. Therefore, CHAP is likely to be used to secure the iSCSI traffic. With incorrectly configured CHAP settings, the host will be unable to see the iSCSI target.
Because the IP networks that the iSCSI technology uses to connect to remote targets do not protect the data they transport, you must ensure security of the connection. One of the protocols that iSCSI implements is the Challenge Handshake Authentication Protocol (CHAP), which verifies the legitimacy of initiators that access targets on the network.
CHAP uses a three-way handshake algorithm to verify the identity of your host and, if applicable, of the iSCSI target when the host and target establish a connection. The verification is based on a predefined private value, or CHAP secret, that the initiator and target share.
ESXi supports CHAP authentication at the adapter level. In this case, all targets receive the same CHAP name and secret from the iSCSI initiator. For software and dependent hardware iSCSI adapters, ESXi also supports per-target CHAP authentication, which allows you to configure different credentials for each target to achieve greater level of security.
Incorrect Answers:
B: The question states that the administrator has performed a rescan operation. This would not be possible if a VMkernel port was not bound to the iSCSI initiator. Therefore, this step must already have been performed so this answer is incorrect.
C: Jumbo frames can be used to improve performance providing all hardware devices support jumbo frames; however, it is not a requirement. Therefore, this answer is incorrect.
D: A vSphere Distributed Switch configuration is not a requirement. Therefore, this answer is incorrect.
References:
http://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.storage.doc/GUID-AC65D747-728F-4109-96DD-49B433E2F266.html