"You want to install a home network. You have a PC tower that you use mainly for your school work and hobby (editing and printing photos). Your spouse has a laptop that is used primarily for online school work. Your two teenage kids have laptops they use for school work, web surfing, and entertainment (MP3s and video clips), and you host a Web Server for your volunteer organization.
Provide a network design, a drawing of a solution to address the following:
Transferring of videos and music files between computers
Sharing Internet connection, one laser printer, and one photo printer
Securing your network
Accessing your PC remotely
People of your community accessing web sites (static web pages) hosted on your web server
The diagram should be complete with proper icons, connectors, devices/services, etc... You are not limited to Microsoft Visio. You may use any diagramming tool available, such as Visio, SmartDraw, even Word or PowerPoint illustrations, but the preference is Visio - as Visio is the industry gold standard tool for network diagramming. No need to provide a wordy explanation of your network design, just a simple design with the proper documentation... MAC users may use a compatible product such as OmniGraffle.