Asus MAXIMUS V EXTREME - Manual (Page 132)

3-36 Chapter 3: BIOS setup
Chapter 3
3.5.9 Network Stack
Network Stack [Disable Link]
This item allows you to disable or enable the UEFI network stack.
Configuration options: [Disable Link] [Enable]
The following items appear only when you set the Network Stack to [Enabled].
Ipv4/Ipv6 PXE Support [Enabled]
Allows you to enable or disable the Ipv4/Ipv6 PXE boot option.
Configuration options: [Disabled Link] [Enabled]