200-150 · Question #150
Which two aspects are characteristic of Fibre Channel WWNS? (Choose two.)
The correct answer is A. 64 or 128 bits long E. allocated to manufactures by IEEE. Fibre Channel WWNs are globally unique identifiers similar to MAC addresses, assigned by IEEE to manufacturers and sized at 64 or 128 bits.
Question
Which two aspects are characteristic of Fibre Channel WWNS? (Choose two.)
Options
- A64 or 128 bits long
- B96 bits long
- C48 bits long
- Dmanually configured on each device by an administrator
- Eallocated to manufactures by IEEE
How the community answered
(40 responses)- A88% (35)
- B3% (1)
- C8% (3)
- D3% (1)
Why each option
Fibre Channel WWNs are globally unique identifiers similar to MAC addresses, assigned by IEEE to manufacturers and sized at 64 or 128 bits.
WWNs come in two formats: the 64-bit WWN (8 bytes) and the 128-bit WWN (16 bytes), used to uniquely identify nodes and ports in a Fibre Channel fabric.
96-bit identifiers are not a defined WWN format in the Fibre Channel standard; valid lengths are 64 or 128 bits only.
48 bits describes the length of an Ethernet MAC address, not a Fibre Channel WWN.
WWNs are factory-burned into HBAs and storage devices by manufacturers, not manually configured by administrators.
Like Ethernet MAC addresses, WWN organizationally unique identifiers (OUIs) are allocated by the IEEE to device manufacturers, ensuring global uniqueness across storage networks.
Concept tested: Fibre Channel WWN format and assignment
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/clibook/san.html
Topics
Community Discussion
No community discussion yet for this question.