Switching and Virtual LANs
Todd Lammle · 2018
This chapter explains the concepts and characteristics of routing and switching and examines how to determine the appropriate placement of networking devices on a network and install or configure them. Each floor of a building ran either coax or twisted-pair wiring to the corporate backbone, which was then connected to a router. PCs ran an emulating software program that allowed them to connect to mainframe services, giving those PCs the ability to access services from the mainframe and LAN simultaneously. The device reads only the frame encapsulating the packet, which makes the switching process considerably faster and less error prone than routing processes. When a device transmits and an interface receives a frame, the switch places the frame's source address in the MAC forward or filtertable, which allows it to remember the interface on which the sending device is located.