LAN Design Requirements - Computer Network - Lecture Slides, Slides of Computer Networks

LAN Design Requirements, LAN Components, LAN Design Hierarchical Approach, Access Layer, Distribution Layer, Core Layer, Network Backbone, Layer 2 Filtering and many other topics of Computer Network can be find in my documents.

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2011/2012

Uploaded on 11/09/2012

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Semester 3 Module 5
Students completing this module should be able to:
Describe the four major goals of LAN design
List the key considerations in LAN design
Understand the steps in systematic LAN design
Understand the design issues associated with the Layer 1, 2, and 3 LAN structure,
or topology
Describe the three-layer design model
Identify the functions of each layer of the three-layer model
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Semester 3 – Module 5

Students completing this module should be able to:

  • Describe the four major goals of LAN design
  • List the key considerations in LAN design
  • Understand the steps in systematic LAN design
  • Understand the design issues associated with the Layer 1, 2, and 3 LAN structure, or topology
  • Describe the three-layer design model
  • Identify the functions of each layer of the three-layer model

LAN Design Requirements

  • Functionality
    • Network must allow users to meet their job requirements
  • Scalability
    • Can be easily upgraded
  • Adaptability
    • Should allow for future advancements in Technology
  • Manageability
    • Should be easily managed and monitored

LAN Components Continued

  • Layer 2 devices
    • Switch – used to implement VLANs and for microsegmentation - Provide flow control, error correction, and congestion reduction
  • VLANs
    • Implemented through switches
    • Connected by routers
    • Create more broadcast domains
    • Increase bandwidth
    • Reduce network traffic

LAN Design – A Hierarchical Approach

Distribution Layer

  • Isolates network problems to the workgroups in which they occur
  • Policy & Security implemented here (ACLs)
  • Layer 2 & 3 switching
  • Multilayer switches (perform both router and switch functions) or switch and router used
  • Defines Broadcast domains
  • VLAN routing

Core Layer

  • Network Backbone
  • Provides redundant paths
  • Rapid forwarding of traffic
  • No packet filtering
  • ATM or Ethernet Switches