tailieunhanh - Lecture Business data communications and networking (8th edition): Chapter 8 - Jerry Fitzgerald, Alan Dennis

Chapter 8 - Backbone networks. In this chapter, the following content will be discussed: Components of backbone networks, backbone network architectures, backbone technologies, best practice backbone design, improving backbone performance. | Business Data Communications and Networking 8th Edition Jerry Fitzgerald and Alan Dennis John Wiley & Sons, Inc Prof. M. Ulema Manhattan College Computer Information Systems 8 - Copyright 2005 John Wiley & Sons, Inc Chapter 8 Backbone Networks 8 - Copyright 2005 John Wiley & Sons, Inc Outline Components of Backbone networks Bridges, Routers, Gateways Backbone network architectures Backbone technologies Best practice backbone design Improving backbone performance 8 - Copyright 2005 John Wiley & Sons, Inc Backbone Networks High speed networks linking an organization’s LANs Making information transfer possible between departments Use high speed circuits to connect LANs Provide connections to other backbones, MANs, and WANs Sometimes referred to as An enterprise network A campus-wide network 8 - Copyright 2005 John Wiley & Sons, Inc Backbone Network Components Network cable Functions in the same way as in LANs Optical fiber - more commonly chosen (provides higher data | Business Data Communications and Networking 8th Edition Jerry Fitzgerald and Alan Dennis John Wiley & Sons, Inc Prof. M. Ulema Manhattan College Computer Information Systems 8 - Copyright 2005 John Wiley & Sons, Inc Chapter 8 Backbone Networks 8 - Copyright 2005 John Wiley & Sons, Inc Outline Components of Backbone networks Bridges, Routers, Gateways Backbone network architectures Backbone technologies Best practice backbone design Improving backbone performance 8 - Copyright 2005 John Wiley & Sons, Inc Backbone Networks High speed networks linking an organization’s LANs Making information transfer possible between departments Use high speed circuits to connect LANs Provide connections to other backbones, MANs, and WANs Sometimes referred to as An enterprise network A campus-wide network 8 - Copyright 2005 John Wiley & Sons, Inc Backbone Network Components Network cable Functions in the same way as in LANs Optical fiber - more commonly chosen (provides higher data rates) Hardware devices Computers or special purpose devices used for interconnecting networks Bridges Routers Gateways 8 - Copyright 2005 John Wiley & Sons, Inc Device Operates at Packets Physical Layer Data Link Layer Network Layer Bridge Data Link Layer Filtered using data link layer addresses Same or Different Same Same Router Network Layer Routed using network layer addresses Same or Different Same or Different Same Gateway Network Layer Routed using network layer addresses Same or Different Same or Different Same or Different Backbone Network Devices 8 - Copyright 2005 John Wiley & Sons, Inc Bridges Data link layer devices Connect LANs with the same Data Link and same Network layers Operate in a similar way to layer 2 switches (learning bridges) Allows different types of cabling 8 - Copyright 2005 John Wiley & Sons, Inc Learning Bridges Operate in a similar way to layer 2 switches: Learn which computers are on each side of the bridge By reading the .