An introduction to wired and wireless networking aimed at home users, but equally applicable in a business context. We will examine basic network theory, typical designs, threats to privacy and security, and steps to reduce the risks presented by these threats. If you are a networking guru, then this is probably not the talk for you. This talk is for anyone interested in learning more about how a small network operates and things they should consider with regards to privacy and security. Topics to be covered: What is Ethernet; how network devices communicate; what is a broadcast zone; what is a subnet; network layers; physical and logical segregation of network traffic; basic WiFi theory; basics of firewall and wireless access point security and why running your own is better than letting your ISP do it for you.