Indeed.
Either good old IEE8E02.3 UTP CAT5 or 5e, or if you are running over area with high emi or chance of it, use STP cabling with an RJ45 at the end or decent encryption on the Wireless device and your sorted.
Don't worry to much about reliability, as most Wireless device use DSSS, which is prefered over FHSS.
FHSS however does have a hidden security benifit, but is slower, hence why most home systems use DSSS to overcome midband interferance.
Most modern houses are built from bricks on the outside, and plasterboard on the inside from my experiance, and TBH I have had FAR more issues with old houses having thick stone walls than flimsy new flat pack houses.
Traditional Ethernet (IEEE 802.3) is the most secure, like I say use Cat5e, and that is secure and easier to setup, doesn't require a signal( ofcourse it requires a signal, normally encapsulated using NRTZ, for those Boffins amonst us who will pick me up on it) or any type of keys, it just works.
Wireless on the otherhand is very handy for people who hate cables, and is generally far slower, 58Mbps if your lucky.
Some claim 108Mbps, but TBH, I've never seen this, and I think it's just the theoretical speed you could get if you where in an interfereance free environment.
I used to be paid to install this kit, and 9 times out of ten I would end up selling the customers a wired solution. It just works far better, is easyer to troublshoot, and is more secure.
If you do want to go the Wireless way though, and are concerned about signal strength, you can by plate directional antenners, that work quite well, and allow you that bit extra mobility.
My 2 pence worth.
Cheers
Matt