Support for iwm
FreeBSD 11-Current added support for the Intel Dual Band Wireless AC 3160/7260/7265 IEEE 802.11ac network adapters (https://www.freebsd.org/relnotes/CURRENT/hardware/article.html)
via the iwm driver(https://www.freebsd.org/cgi/man.cgi?query=iwm&sektion=4&manpath=freebsd-release-ports).
In the current snapshot(2.4.0.b.20170725.1611) the driver is not loaded and will not create a network interface, but is visible via pciconf:
none4@pci0:3:0:0: class=0x028000 card=0x80708086 chip=0x08b38086 rev=0x83 hdr=0x00
vendor = 'Intel Corporation'
device = 'Wireless 3160'
class = network
There are other people with the same issue when the iwm driver is not supported: https://forum.pfsense.org/index.php?topic=134079.0 and involves copying driver from vanilla freebsd