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Chapter 1 : Designing and Supporting Computer Networks, Network…
Chapter 1 : Designing and Supporting Computer Networks
Explain How a Hierarchical Network Design Creates a Stable, Reliable, Scalable Network
Advantages of Modular Framework
It creates a deterministic network with clearly defined boundaries between modules.
It eases the design task by making each module independent.
It provides scalability by allowing enterprises to add modules easily.
It enables the designer to add services and solution without changing the underlying network design.
Steps in network design projects:
Identify the network requirements
Characterize the existing network
Design the network topology and solutions
Explain what Factors Need to be Considered when Designing the Network Core Layer
Network backbone
Goals of the Core Layer
Provide 100% uptime
Maximize throughput
Facilitate network growth
Combining routing and switching in the same device
Redundancy and load balancing
High-speed and aggregate links
Quick convergence
Full mesh topology
Partial mesh topology
Failure prevention
Reducing human error
Network requirements
Ease of management
Fast recovery
Application response time
Fast troubleshooting
Four fundamental network design goals:
Scalability
Availability
Security
Manageability
Core Layer: connects Distribution Layer devices
Distribution Layer: interconnects smaller LANs
Access Layer: provides connections for hosts and end devices
the three-layer model into modular areas
Enterprise campus
Server farm
Enterprise edge