Cisco® LAN Switching - PDF Free DownloadWelcome to the world of LANS, in the previous couple of chapters, we learnt about routers and how they are used in the networking environments. The concepts we will learn will also tie in with routing concepts. With technology, this has been made possible, the use of new methods of communicating such as the use of voice, video, data which is transmitted over networks is crucial. As such, we need to design LANs with these needs in mind. In this chapter, we will discuss some of the considerations to make while we design the LAN. We will look at the hierarchical LAN model and its benefits, some design considerations as well as the benefits of well-designed LANs.
LAN Switching and Wireless, CCNA Exploration Companion Guide
A network switch also called switching hub , bridging hub , officially MAC bridge  is networking hardware that connects devices on a computer network by using packet switching to receive, and forward data to the destination device. A network switch is a multiport network bridge that uses media access control addresses to forward data at the data link layer layer 2 of the OSI model. Some switches can also forward data at the network layer layer 3 by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches. Switches for Ethernet are the most common form of network switch. The first Ethernet switch was introduced by Kalpana in
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