NS0-157 · Question #252
What command is used to show an iSCSI software initiator WWPN?
The correct answer is D. iSCSI does not use a WWPN. iSCSI does not use WWPNs; that identifier is exclusive to Fibre Channel, while iSCSI uses IQNs (iSCSI Qualified Names) to identify initiators.
Question
What command is used to show an iSCSI software initiator WWPN?
Options
- AiSCSI show nodename
- Biscsiadm show WWPN
- Ciscsiadm -m node
- DiSCSI does not use a WWPN
How the community answered
(49 responses)- A8% (4)
- B4% (2)
- C2% (1)
- D86% (42)
Why each option
iSCSI does not use WWPNs; that identifier is exclusive to Fibre Channel, while iSCSI uses IQNs (iSCSI Qualified Names) to identify initiators.
'iSCSI show nodename' references a WWPN parameter that has no meaning in iSCSI - the protocol uses IQNs, not WWPNs.
'iscsiadm show WWPN' is not a valid command and WWPN is not a concept applicable to iSCSI initiator management.
'iscsiadm -m node' is a real Linux iSCSI command, but it returns IQN and discovery information, not a WWPN, because iSCSI has no WWPN identifier.
WWPN (World Wide Port Name) is an identifier specific to Fibre Channel HBAs and fabric infrastructure. iSCSI is an IP-based block protocol that identifies initiators using IQNs or EUIs, not WWPNs. Because the iSCSI protocol has no concept of a WWPN, there is no such value to display on a software iSCSI initiator.
Concept tested: iSCSI IQN vs Fibre Channel WWPN identifier distinction
Source: https://docs.netapp.com/us-en/ontap/san-admin/iscsi-concept.html
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