1. LAN Design LAN Switches

2. LAN Design - Servers Workgroup Enterprise
Provide file/print/application services to groups of users
Placed in IDF close to users
Enterprise
Provide enterprise services such as DNS, , applications
Increasing trend to enterprise servers in organisations
Should be placed in MDF

3. LAN Design - Availability
Goal to maximise availability
Throughput
Response time
Access to resources

4. Layer 1 Design Copper medium? – CAT5, CAT5e, CAT6 UTP/STP Fibre?
Position of MDF/IDF to create appropriate catchment areas

5. Layer 2 Design
Flow control, error detection & correction, reduce congestion
Reduce collision domain size & effects of collisions
Keep collision domains small – ideally fully switched full-duplex environment

6. Layer 3 Design Controls traffic flow between network segments
Logical addressing scheme to separate different network/workgroup functions
Broadcast control

7. Hierarchical Design Model
Core layer – backbone – no packet manipulation
Distribution layer – packet manipulation, interconnecting workgroups, Layer 3 switches, enterprise servers
Access layer – closest to user/workgroup – hosts, switches, workgroup servers