Regarding Mesh Question, let's not use Triband anymore because we have WIFI 6E & 7 now, will be confusing in later on.

First, TP Link have two Mesh solution, OneMesh™ and Deco Mesh.
OneMesh device and Deco Mesh device not compatible with each other.

For any Mesh solution, inclusive other brand like Asus, etc. You want them to have dedicated channel for internal communication between Mesh devices, you can either:
a.) Use ethernet cable
b.) Use dedicated wifi band reserved just for Mesh.

As for network topology, you should always is Star topology, don't use Chain topology.
For example if you have three-story house. You want to have main Deco that serve as Router deploy in second-story, while the rest connected to main Deco in star topology.
If you main Deco place at first / third story, then the further Deco need to chain via middle Deco to reach main Deco, this will congested the traffic.

As for whether to use default router setup by ISP or your own Deco, I would always use Deco because the Deco itself can operate as Router mode.

This post has been edited by yeo1992cc: Mar 24 2024, 11:03 AM