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NETWORK DESIGN - Coggle Diagram
NETWORK DESIGN
HIERARCHUCAL NETWORKS
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Access, Distribution, and Core Layer Functions
Acces Layer
The access layer represents the network edge, where traffic enters or exits the campus network
Distribution Layer
- Aggregating large-scale wiring closet networks
- Aggregating Layer 2 broadcast domains and Layer 3 routing boundaries
- Providing intelligent switching, routing, and network access policy functions to access the rest of the network
- Providing high availability through redundant distribution layer switches to the end user, and equal cost paths to the core
- Providing differentiated services to various classes of service applications at the edge of the network
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SCARALABLE NETWORKS
Design for Scalability
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- Scalable Multiple Protocol
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Plan for Redundancy
One method of implementing redundancy is by installing duplicate equipment and providing failover services for critical devices.
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Increase Bandwidth
Link aggregation, such as EtherChannel, allows an administrator to increase the amount of bandwidth between devices by creating one logical link made up of several physical links.
Expand the Access Layer
Providing wireless connectivity offers many advantages, such as increased flexibility, reduced costs, and the ability to grow and adapt to changing network and business requirements.
SWITCH HARDWARE
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Switch Form Factors
- Fixed configuration switches
- Modular Configuration Switches
- Stackable configuration switches
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Forwarding Rates
Forwarding rates define the processing capabilities of a switch by rating how much data the switch can process per second. Switch product lines are classified by forwarding rates.
Power over Ethernet
Power over Ethernet (PoE) allows the switch to deliver power to a device over the existing Ethernet cabling.
Multilayer Switching
Are typically deployed in the core and distribution layers of an organization's switched network. Multilayer switches are characterized by their ability to build a routing table, support a few routing protocols, and forward IP packets at a rate close to that of Layer 2 forwarding.
ROUTER HARDWARE
Router Requirements
Routers play a critical role in networking by connecting homes and businesses to the internet, interconnecting multiple sites within an enterprise network, providing redundant paths, and connecting ISPs on the internet. Routers can also act as a translator between different media types and protocols.
Cisco Routers
Categories of routers
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- Services Provider Routers
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Router Form Factors
Network administrators in an enterprise environment should be able to support a variety of routers, from a small desktop router to a rack-mounted or blade model.