I'm working on my thesis and was wondering what you guys would choose when searching for these things (even if you could only find one thing for me, I'd be more than happy!)

Case: a small company with 15 employees needs to have a server in their office, I need to find a few things to make it all happen. Some employees will use their laptop to be connected via WiFi -- I've found most things but I'm wondering for a few things and that's why I would like your input.

- What modem?
- What router? (RACK-model if possible)
- What firewall?
- What switch? (Rack model if possible)
- What network server? (should fit in the rack)
- Where can I find a choice for patch panels, cables, TCP/IP boxes etc?

Are there other things I shouldn't forget?

Thanks in advance everybody for helping me!