Kernel.org: 4.12
sid (unstable): 4.11.6-1
stretch (testing): 4.9.30-2+deb9u2
jessie (stable): 3.16.43-2+deb8u2
wheezy (oldstable): 3.2.89-2

Debian GNU/Linux device driver check & report

Toshiba: Satellite C855D - 13N

PCI IDWorks?VendorDeviceDriverKernel
10ec8723Realtek Semiconductor Co., Ltd.RTL8723AE PCIe Wireless Network Adapter

The WiFi works on wheezy-backports (firmware-realtek); `uname-a`:
Linux <snip> 3.10-0.bpo.3-amd64 #1 SMP Debian 3.10.11-1~bpo70+1 (2013-09-24) x86_64 GNU/Linux (2013-10-15T03:49:45+00:00)