When is a wireless AP controller needed?

I need to deploy up 7  WLAN access points for an office building.

Nothing too complicated.

The brand will either be Tp-LInk or Ubiquiti - still undecided.

Will I need to deploy a wireless controller as well?
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Andy SCommented:
Essentially a wireless controller will help to manage the wireless network and makes it far easier to make 'one' network instead of 7 individual networks. If you want to change something about the network, you make the change once on the controller instead of 7 times on each access point. If the budget allowed for it, I would recommend a solution which includes a wireless controller. Make sure that the controller will allow you to connect more access points than you currently have, then it's easy to expand the network later.

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furunoAuthor Commented:
ok thanks Andy.

In terms of stability and reliability of the WLAN does a wireless controller help?
andreasSystem AdminCommented:
yes it may help as it makes administration more easy. So you can centrally manage the settings of the APs. like used channels, Security credentials/Keys, etc. pp. So in case of debugging and testing you will proceed much faster in resolving the issue. Thus you may get a better reliability.

But in day by day operations, once it runs smoothly you will not gain much from it.

Will you use 802.11X authentication or PSK? If psk how frequent you plan to change the keys?
If its frequent a controller is also worth as then you dont need to do it several times on each access point.
furunoAuthor Commented:
Thanks Andy and Andreas.
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