Answer the following critical-thinking questions:
1. Analyze and describe three network topologies and four network types in common use today.
2. Evaluate and explain how the Internet works, including the roles of the Internet backbone, TCP/IP protocol, IP address, switches, and routers.
3. Summarize five common Internet and Web applications.
Your submission should be a minimum of one page of content in length. Please type the question as well as your answer. Properly cite any source utilized in APA format.