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C H A P TER 12 purpose Switched local area vane Inter net profits This chapter describes the following three technologies that network spiriters can use to design switched local area network internetworks: local area network switching Virtual LANs (VLANs) automatic teller machine switching ontogeny from Shared to Switched Networks In the past, network designers had solitary(prenominal) a express number of hardware options when purchasing a technology for their campus networks. Hubs were for wire public presss and routers were for the data center or of import telecommunications operations. The increasing causation of scope processors and the requirements of client-server and multimedia applications, however, have operate the need for great bandwidth in traditional shared-media environments. These requirements are mesmerism network designers to interchange hubs in their wiring closets with switches, as shown in Figure 121. Figure 12-1 Evolution from s hared to switched internetworks.

The hot wiring closet Si handed-down wiring closet Shared hub Multilayer switch (Layers 2 and 3) LAN switch (Layer 2) Hub standard atmosphere campus switch Router Router cisco router Traditional backbone Router CDDI/FDDI concentrator Cisco router The new backbone Shared hub This strategy allows network managers to encourage their breathing wiring investments and boost network performance with utilise bandwidth to the desktop for each user. Coinciding with the wiring closet evolution is a similar trend in the network backbone. Here, the determinatio n of asynchronous Designing Switched LAN In! ternetworks 12-1 Technologies for construction Switched LAN Internetworks Transfer individual(prenominal) manner (ATM) is increasing as a result of standardizing protocols, much(prenominal) as LAN emulation (LANE), that enable ATM devices to coexist with existing LAN technologies. Network designers are collapsing their router backbones with ATM switches, which can the great backbone bandwidth required by high-throughput data services. Technologies for Building Switched LAN Internetworks With...If you want to get a full essay, stray it on our website: BestEssayCheap.com

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