Propose a solution for the LAN network infrastructure of a Courier service companys headquarters (minimum FIVE floors). It is important to justify what you have proposed. Example of proposed solutions are (but not restricted to):

1. Networking devices (e.g. bridge, switch, AP, router, gateway)
2. Topology (e.g. bus, star, ring)
3. Communication media (e.g. coaxial cable, UTP, STP, fibre optics, WiFi)