The document discusses 5 solutions for building networks of varying sizes using Cisco devices:
1. A small business network with 2-20 PCs can use a Cisco router and 24-port switch for an easy and cheap configuration.
2. For harsh environments, adding an ASA firewall, Cisco router, and 48-port switch provides stronger security and stability.
3. A network with around 100 clients across multiple offices benefits from a distribution switch to improve forwarding between offices, along with fiber modules for increased speed.
4. Larger networks supporting IP phones and video need powerful firewalls, voice-enabled routers, T1 modules, and PoE switches to power phones.
5. The largest