LAN is a network and the WAN is the internet.

Course Textbooks;u will need copies of these-i dont have digital copies so do not ask!

Boyle, R. J., & Panko, R. R. (2015). Corporate computer security (4th ed.). Upper Saddle River, NJ: Pearson. 

Meyers, M. (2013). Mike Meyers' CompTIA A+ guide to 801: Managing and troubleshooting PCs (4th ed.). New York, NY: McGraw-Hill.

Meyers, M. (2013). Mike Meyers' CompTIA A+ guide to 801: Managing and troubleshooting PCs lab manual (4th ed.). New York, NY: McGraw-Hill.