I see. Unfortunately, the download link doesn't work anymore, file has been removed already. Mal sehen, wann die neue Version auf der offiziellen Seite erscheinen wird. Am besten wäre es, Du fragst...

fun_E_mahn wrote 1. Can I 'daisy-chain' the units in such a way that 'main' feeds 'campus1', 'campus1' feeds 'campus2', 2 to 3, and 3 to 4? Yes. Main building could be configured as AP, campus1/2/3...

Yes, 802.11a is 54 Mbps and 20 MHz channel width only.

You can either block or de-authenticate guests or block users in Clients menu using the buttons on the right of an entry for a user, but not "delete" them. BTW: where did you get the Controller...

EAPs are access points, not WiFi extenders, so no, the EAP110 can't be configured as an wireless extender.

Both grounding methods are viable alternatives, yes. If antenna poles are grounded already, easiest way is to use a grounding strap from the CPE to the pole. If grounding antenna poles is costlier,...