1. Networking and Telecommunications Chapter 7

10. LANs, MANs, and WANs Illustrated Within the confines of a room or single building Connecting LANs from multiple buildings Commonly connects separate offices from the same organization, whether they are across town or across the world

17. Bus/Star/Ring Topologies Bus Topology (linear bus) All devices are connected to a central cable, called the bus or backbone. These networks are relatively inexpensive and easy to install for small networks Star Topology All devices are connected to a central device, called a hub. Star networks are relatively easy to install & manage, but bottlenecks can occur because all data must pass through the hub Ring Topology The ring topology connects computers on a single circle of cable. Signals travel around the loop in one direction and pass through each computer acting like a repeater to boost the signal and send it on to the next computer.

18. Hybrid / Wireless Topologies Hybrid Topology Groups of star-configured workstations are connected to a linear bus backbone cable, combining the characteristics of bus and star topologies Wireless Devices are connected by a receiver/transmitter to a special network interface card that transmits signals between a computer and a server---all with an acceptable transmission range

19. NETWORK TOPOLOGY

28. Wire Media

30. Networking Hardware Basics Hubs Connectivity device that retransmits incoming data signals to its multiple ports –Typically used for Star topologies and use twisted pair cabling Repeaters A device used to regenerate a signal—addresses a transmission signal problem called attenuation Bridges Allows large networks to be broken up into segments-segments are connected by a bridge----manages bandwidth Switch Also manages bandwidth on a large network—further divides a network into smaller domains Router Routing device that examines each packet of data it receives and then decides which way to sent it towards its destination

33. E-BUSINESS NETWORKS

39. Emerging Technologies: teleprensence Telepresence