--- title: kIOPropertyFibreChannelPortWorldWideNameKey framework: DriverKit role: symbol role_heading: Macro platforms: [DriverKit 20.0+, macOS 10.3+] path: kernel/kiopropertyfibrechannelportworldwidenamekey --- # kIOPropertyFibreChannelPortWorldWideNameKey ## Declaration ```occ #define kIOPropertyFibreChannelPortWorldWideNameKey ``` ## Discussion This key is the unique 64-bit World Wide Name for the port. Requirement: Mandatory for Fibre Channel Interface. Example: ```occ Protocol Characteristics Physical Interconnect Fibre Channel Interface Physical Interconnect Location External Port World Wide Name 0011223344556677 ``` Example2: ```occ Controller Characteristics Port World Wide Name 0011223344556677 ```