Chapter Modules Chapter Objectives CHAPTER An Evolution of Physical Network Architectures

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Chapter Modules Chapter Objectives CHAPTER An Evolution of Physical Network Architectures

Capital University Law School, US has reference to this Academic Journal, CHAPTER An Evolution of Physical Network Architectures Chapter Objectives Discuss the different network hardware architectures that span varying sizes of business enterprises Provide an insight into LAN architectural evolution Centralized, decentralized, mixed etc. Introduce the WAN architecture that is becoming increasingly relevant so that the Internet Chapter Modules Small Computer Networks Medium Sized Computer Networks Large Scale Computer Networks Enterprise Computer Networks Wide Area Networks

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Chapter Focus on Functional Types Distributed LAN driven Current trend Centralized Mini/Mainframe derived Past trend in addition to probably the future trend Combination Distributed/ Centralized Emerging trend MODULE Small Computer Networks Major Types Distributed Resources in addition to executions are distributed over the network LAN Centralized Resources in addition to execution are confined so that a central unit Multi-user Micro A Unix multi-user computer operating under the Unix operating system Entry-level minicomputers also known as departmental computers

LAN Evolution File Server Application Server (Client-Server Technology) Thin-Clients & Terminal Servers Distributed execution Cooperative execution Centralized execution Past Present Future Mainframe architecture of the past IBM 9370 Virtual Machine Example END OF MODULE

Investment Regulations in addition to DC Pensions Thank you!

Suns Computer Network Sun Enterprise Server Pentium Pentium Web Research Visit sun in addition to obtain information about their Sun Enterprise servers How are they networked together? Choose a server so that serve 25 workstations Sun Enterprise Server 220R MODULE Medium Sized Computer Networks

Major Types Centralized architecture Past, present in addition to possible future Minicomputers Decentralized architecture Present Very large LANs alongside Multiple segments Mixed architecture Combination of both of the above Large LAN alongside different network segments Centralized Architecture: Medium Sized Computer Network AS 400 Micro Micro Micro OS 400 Token Ring OS2 / Warp Web Research Visit ibm so that obtain more information about the configuration of an AS 400 computer for: Running OS/400 Functioning as a file server in consideration of a Windows net work Name the different IBM server families Visit search400 in consideration of additional information on AS/400

Decentralized Architecture: A Switched LAN Ethernet Switch Client Client Client Client Client Client Ethernet LAN Segments Hub Hub END OF MODULE MODULE Large-Scale Computer Networks

Types Centralized Architecture Decentralized Architecture Combination of both Examples Mainframe computer Centralized Heterogeneous LAN Distributed Large Scale Centralized Computer Network Concentrator Term. PC Pc Mainframe Front-end Processor DASD Hard Disk Modem Server

Mainframe Reference Terminology in consideration of Equipment DCE (Data Communication Equipment) Front-end Processor, Modem Server in addition to Concentrator in consideration of example DTE (Data Terminal Equipment) Terminals, PCs in addition to Printers in consideration of example LAN Reference Terminology in consideration of Equipment Internetworking devices Switches, Routers etc. Clients or Workstations PCs Heterogeneous LAN Architecture Router Switch WS Hub Hub WS WS WS WS WS WS WS WS Server 3 Server 4 LANs With Servers/Minicomputers Server 1 Server 2

Switch Switch network traffic between the LAN segments Allows crossover traffic from one segment so that another segment Otherwise, the network traffic is confined so that the individual segments Used in consideration of connecting LAN segments that operate under the same protocol Performs Layer 2 functions Newer switches may also perform some routing which is a Layer 3 functions Such switches are called Layer 3 switches Router Used in consideration of connecting LAN segments that operate under different protocols A more advanced device compared so that the switch Routes traffic between different LANs Performs Layer 3 functions Web Research Visit whatis in addition to get the definition in consideration of switches in addition to gateways Access cisco so that obtain further information on the following Switch Router

END OF MODULE MODULE Enterprise Computer Networks Major Types Centralized Based on mainframes Mainframe derived architecture Decentralized Based on a backbone used of connecting LANs in addition to other computer systems LAN driven architecture

Web Research Access a reference website such as whatis so that obtain information on the following ATM, Frame Relay, X.25 DS1, DS3 etc. T1, T3 etc. OC1, OC3 etc. Switches in addition to Routers END OF MODULE END OF MODULE END OF CHAPTER

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This Particular Journal got reviewed and rated by Switch Switch network traffic between the LAN segments Allows crossover traffic from one segment so that another segment Otherwise, the network traffic is confined so that the individual segments Used in consideration of connecting LAN segments that operate under the same protocol Performs Layer 2 functions Newer switches may also perform some routing which is a Layer 3 functions Such switches are called Layer 3 switches Router Used in consideration of connecting LAN segments that operate under different protocols A more advanced device compared so that the switch Routes traffic between different LANs Performs Layer 3 functions Web Research Visit whatis in addition to get the definition in consideration of switches in addition to gateways Access cisco so that obtain further information on the following Switch Router and short form of this particular Institution is US and gave this Journal an Excellent Rating.