Enterprise Networks
Chapter 1: Hierarchical Network Design
1.1 Overview
Small network: 1 to 200 devices
Medium: 200 to 1000 devices
Large network: 1000+ devices
Structured Engineer Principles
- Hierarchy
- Modularity
- Resiliency
- Flexibility
- Hierarcy
o Access layer: user access to the network
o Distribution layer: policy-based connectivity
o Core layer: Fast transport between distribution switches
Access layer:
Layer 2 switching
Availability
Port security
QoS
ARP inspection
VACLs
Spanning tree
PoE
Distribution layer:
Aggregation LAN/WAN links
ACLs (policy based security)
Redundancy/load balancing
Core:
High-speed switching
Reliability/fault tolerance
Faster equipment
Avoid CPU-intensive tasks (security, inspection,QoS)
Chapter 1: Hierarchical Network Design
1.1 Overview
Small network: 1 to 200 devices
Medium: 200 to 1000 devices
Large network: 1000+ devices
Structured Engineer Principles
- Hierarchy
- Modularity
- Resiliency
- Flexibility
- Hierarcy
o Access layer: user access to the network
o Distribution layer: policy-based connectivity
o Core layer: Fast transport between distribution switches
Access layer:
Layer 2 switching
Availability
Port security
QoS
ARP inspection
VACLs
Spanning tree
PoE
Distribution layer:
Aggregation LAN/WAN links
ACLs (policy based security)
Redundancy/load balancing
Core:
High-speed switching
Reliability/fault tolerance
Faster equipment
Avoid CPU-intensive tasks (security, inspection,QoS)