CCNA Routing and Switching Exam 200-125 Study Guide

Chapter 1: Network Fundamentals
Technology Brief To understand Network Fundamentals, you should be familiar with the concept of a Network. A network refers to two or more connected computers that can share resources such as data, a printer, an Internet connection, applications, or a combination of these resources. Knowledge of Networking Fundamentals opens the doors to a career in networking. Network fundamentals and skills should be acquired to install, operate to install, operate, and troubleshoot a small enterprise branch network. Typical Networking Fundamentals topics include WAN technologies, basic security and wireless concepts, routing and switching fundamentals, and configuring simple networks.
Compare and Contrast OSI and TCP/IP models Whether it’s wired or wireless, most data communications today happen by way of packets of information travelling over one or more networks. But before these networks can work together, though, they must use a common protocol, or a set of rules for transmitting and receiving these packets of data. Many protocols have been developed. One of the most widely used is the Transmission Control Protocol/Internet Protocol (TCP/IP). Also, a generic protocol model used in describing network design and communications known as the Open System Interconnection (OSI).