The Open Systems Interconnection (OSI) model is a guiding principle in online system design. By working from the OSI model, you could ensure that your employers online environment could accommodate interoperability among different online software products and services.

> Draw a chart for the OSI model and their numbers from top to bottom.

> Name three problems with cabling and the methods to counteract those issues.

> How do you protect your employers domain name from being hijacked?