|  | 1.4 | Basic Networking Terminology
| 1.4.1 | Networks and networking

A network is an intricately connected system of objects or people. Networks are all around us, even inside us. Your own nervous system and cardiovascular system are networks. The cluster diagram in the figure shows several types of networks; you may think of others. Notice the groupings:

- communications
- transportation
- social
- biological
- utilities