First, this has been the most informative post I have yet to receive; even on other website forums. A big THANK YOU!!!
A few questions though:
I am not sure I follow you on the above quote. It seems to contradict itself. I "thought" that was what I was doing to better my network; adding a GB level switch to my current router (which will function ONLY as a router) and then a wireless router/access point to it.
***It seems to me that the article titled "How to Improve your Network" is thus invalid according to our discussion here. Although, I may be misunderstanding your theories.
In regards to my LAN activity, my main reasoning in this "network change/optimization" is to have a more stable "pure" connection directly to my PS3 for online gaming. My handheld devices such as the iPad/iPhone and even the laptop are low priority; in regards to speed and maximum throughput. My PS3, Xbox and (PS4 soon; fingers-crossed) are my #1 priority in "optimizing" my network. I want to minimize any latency and be sure I am receiving my ISP paid for speeds (50/5).
We are not contradicting each other - we are seeing it from different perspectives.
Because your main use is mostly as a single user at a time, it almost doesn't matter if you add an external switch or not. Especially the way you use your wireless devices.
This may help clear up some of the confusion:
A current wireless router is basically four or five devices in one:
1) A Firewall between our LAN and the outside world.
This needs to be directly connected to our ISP supplied modem without throttling our ISP paid for speeds. Most wireless routers have enough horsepower today for this to not be an issue.
2) A Router (WAN to LAN) between wired and wireless clients.
This needs to have enough performance so that it doesn't bottleneck our ISP paid for speeds (even with multiple devices being connected, and multiple connections per client).
With HW acceleration enabled and actually being used (it can be turned off by enabling QoS, for instance) most N600 and N900 routers should provide enough WAN/LAN and LAN/WAN and SIMULTANEOOUS WAN/LAN wired routing performance for at least a 100Mbps up/down ISP connection.
Newer routers with better processors (SoC's) and more RAM such as the RT-AC56U and the even better (but same SoC equipped) RT-AC68U can provide better routing performance even with features such as QoS enabled (i.e. with HW acceleration disabled; around 250Mbps up/down).
3) A Radio Transmitter (x2, if it's 2 bands) between our Wireless clients.
Depending on the router, an AP may or may not have better radios than any specific 'combo' wireless router we're comparing it too. Many times; it can be worse too.
Of course if our wireless router is a top end model like an RT-N66U or higher. While we can use the same model router and use it in AP only mode - the only benefit would be if we could wire it directly AND move it to a more central location that would be closer for most of our wireless clients for most of the time.
It will still be a bottleneck if we're using those wireless devices the AP is supporting to share network resources located either on the router itself or on a device such as a NAS (such as music, video, pictures or other files) - because now all those devices are going through the single Ethernet cable to the main router that connects it to the rest of our network.
4) USB Ports for sharing HDD's and Printers with our whole network.
This part depends heavily on faster processors (especially for USB 3.0 devices) to operate at an expected level (most routers are still disappointing in this area - but considering they are replacing an 'always on' stand alone computer; the performance compromises for the infrequent usage are usually worth it for some users).
5) A switch for our wired clients (usually 4 ports, but up to 8 are available for some obscure models).
This part is as fast as any discrete switch you can buy at a reasonable price.
While most wireless routers offer only us 4 additional ports (and are therefore nominally 5 port switches, including the WAN port), they are not inferior performance-wise.
Adding a single external switch to a single router port and then connecting all devices to this single added switch is a way to introduce bottlenecks in the network as a whole.
It will depend on which devices are accessing which network resources (wired or wirelessly) and will depend if their network use is rare, frequent, intermittent, continuous or otherwise variable.
I hope this different take and presentation of the same topic helps convey what I'm trying to explain better to you?
You may want to read the whole thread again and the included links for better comprehension.
Also; if anyone can write better than what I have attempted, please jump in!
As for the type of cable to install? A quality CAT6 cable is all that is required and if the runs are less than 128'-180' you're also set for wired 10GBASE-T performance (needed for future, fully realized, AC class connections).
If you have the budget to install the better CAT6a cables, you own the house you're in and you don't plan on selling/moving in the foreseeable future, that would be what I would suggest to install instead.
Before you call your wiring 'done' - make sure to stress test it with all runs tested concurrently.