Yes, that is the Intel LAN boot option, for booting to PXE server. You can disable this in the BIOS settings under Advanced tab. The setting is under section PCIe/PCI/PnP Configuration:
Load Onboard LAN1 Option ROM / Load Onboard LAN2 Option ROM
This feature is to enable or disable the onboard option ROMs. The options are Disabled and Enabled. The default for LAN 1 is Enabled. Default for LAN 2 is Disabled.