Asus P8Z77-V PRO/THUNDERBOLT - Manual (Page 110)

3-34 Chapter 3: BIOS setup
Chapter 3
3.5.9 Network stack
Main Ai Tweaker Advanced Monitor Boot Tool
Exit
Enable/Disable UEFI network stack
Back Advanced\ Network stack >
EFI BIOS Utility - Advanced Mode
Network stack Disabled Link
Network stack [Disabled Link]
This item allows user to enable/disable UEFI network stack function.
Configuration options: [Disabled Link] [Enabled]
The following two items appear only when you set the Network stack item to [Enabled].
Ipv4 PXE Support [Enabled]
This item allows user to enable/disable Ipv4 Boot Support.
Configuration options: [Disabled Link] [Enabled]
Ipv6 PXE Support [Enabled]
This item allows user to enable/disable Ipv6 Boot Support.
Configuration options: [Disabled Link] [Enabled]