Section 1- Introduction to Networks -What is a Network? a specific purpose. The term network is used in a variety of contexts, including telephone, television, computer, or even people networks. A computer network connects two or more devices together to share a nearly limitless range of information and services, including: • Documents • Email and messaging • Websites • Databases • Music • Printers and faxes • Telephony and videoconferencing Protocols are rules that govern how devices communicate and share information across a network. Examples of protocols include: • IP – Internet Protocol • HTTP - Hyper Text Transfer Protocol • SMTP – Simple Mail Transfer Protocol Multiple protocols often work together to facilitate end-to-end network communication, forming protocol suites or stacks. Protocols are covered in great detail in other guides. Network reference models were developed to allow products from different manufacturers to interoperate on a network. A network reference m...