Discuss the role of each layer in the hierarchical network model. (1 point) What

Question

Discuss the role of each layer in the hierarchical network model. (1 point)

What are three roles of the hierarchical model’s core layer? (1 point)

What are the major functional areas in the Cisco Network Architectures for Enterprise? Describe each area. (1 point)

Why does the Cisco hierarchical network design suggest only using a two-tier LAB design for small to medium sized companies? What do the two tiers look like? (1 point)

What is the main function of an access layer switch, and where do you find it? What features are important for an access layer switch? (1 point)

What is the main function of a distribution/core layer switch, and where do you find it? What features are important for a distribution/core layer switch? (1 point)

What other factors besides network requirements and costs should be considered when selecting a switch to add to your company’s network? (1 point)

Choose an access switch appropriate for the following scenario. A company has a project that requires visiting internal employees who will be coming in on an as needed basis and working out of a conference room (since no cubicles are available). The switch will be placed on the conference room table and switch security is a priority. What switch might you select? (1 point)

Choose an access switch appropriate for the following scenario. A company wants to replace a switch currently located in the wiring closet, and wants the new switch to be able to scale for future growth and increased bandwidth usage. Currently there are 32 users that need high-speed uplink. The company is considering new applications, so they have required VoIP and multicast support for the new switch as well. What are some of the models that you could choose for this project? (2 points)

Choose a distribution/core switch appropriate for the following scenario. A company is planning for next year’s budget and wants to consider replacing the backbone switch. They want to minimize downtime in an event that an internal component fails and make sure they have planned for redundancy. What switch features should they consider as they investigate possible replacement switches? (1 point)

11.What switch models could they consider for this scenario? (2 points)

Choose a distribution/core switch appropriate for the following scenario. A company is planning for next year’s budget and wants to consider replacing the backbone switch. They want to plan for high speed (10GB Ethernet), up to 8 uplink ports and a modular switch configuration. What switch model should they consider as they investigate possible replacement switches? (2 points)

Explanation / Answer

Roles of layers in hierarchical network model:

There are unit three layers in stratified network model(hierarchical network model):
Access layer:
End-stations and servers connect with the enterprise at the access layer. Access layer devices unit of measurement usually artifact shift platforms, and can or may not provide layer 3 shift services. the quality focus at the access layer is minimizing "cost-per-port": the number of investment the enterprise ought to bring each provisioned native space network port. This layer is to boot noted because the desktop layer as a results of it focuses on connecting shopper nodes, like workstations to the network.
Distribution layer:
The distribution layer is that the great layer at intervals the three-layer model. Routing, filtering, and QoS policies unit of measurement managed at the distribution layer. Distribution layer devices to boot typically manage individual branch-office WAN connections. This layer is to boot noted because the Workgroup layer.
Core layer:
The core network provides high-speed, extraordinarily redundant forwarding services to maneuver packets between distribution-layer devices in varied regions of the network. Core switches and routers unit of measurement usually the foremost powerful, in terms of raw forwarding power, at intervals the enterprise; core network devices manage the highest-speed connections, like 10 Gigabit native space network.

core layer:

The core layer is additionally cited because the network backbone. The core layer consists of high-speed network devices like the Cisco Catalyst 6500 or 6800. These square measure designed to modify packets as quick as doable and interconnect multiple field parts, like distribution modules, service modules, the info center, and therefore the WAN edge.
The core ought to be extremely offered and redundant. The core aggregates the traffic from all the distribution layer devices, therefore it should be capable of forwarding massive amounts of information quickly.
Three roles of core layer are:
Providing high-speed change (i.e., quick transport)
Providing responsibleness and fault tolerance
Scaling by mistreatment quicker, and no more, equipment
Avoiding CPU-intensive packet manipulation caused by security, inspection, quality of service (QoS) classification, or alternative processes

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