- What is a network?
- A network allows nodes to communicate and share resources
- Nodes
- Router - These devices forward and connect network traffic between multiple networks
- Switch - These devices create local area networks (LAN)
- Firewall - These devices control network traffic
- Filters traffic based on configured rules
- Server - These devices make services available to clients
- Client - These devices will access services available to them
- Cell Phone
- Computer
- Laptop
- PC
- Tablet
- Other important terms to know
- Cloud - We will call this the “internet”
- ISP - The company that you pay to get internet access in your business or home
Here is a visual representation of each node
 | Router |
|---|---|
 | Switch |
 | Firewall |
 | Server |
 | Client |
 | Cloud |
 | ISP (Internet Service Provider) |
Here is a basic network: A network between to PCs is a valid network
- If PC1 asks PC2 for a picture, PC1 is acting like a client and PC2 is acting like a server
