Three-Layer Hierarchy Network Design Model

What is the primary function of the Access layer in the three-layer hierarchy network design model?

• To provide network access for workgroups and users

• To control the flow of data between different parts of the network

• To provide fast transport between distribution switches

• To route data at the core layer

Answer explanation

The primary function of the Access layer is to provide network access for workgroups and users.

Which layer in the three-layer hierarchy network design model is responsible for policy-based connectivity and controlling the boundary between the access and core layers?

• Access layer

• Distribution layer

• Core layer

• Hierarchy layer

Answer explanation

The distribution layer in the three-layer hierarchy network design model is responsible for policy-based connectivity and controlling the boundary between the access and core layers.

What is the role of the Core layer in the three-layer hierarchy network design model?

• To provide redundancy at the core

• To ensure data travels quickly across the network

• To manage the flow of data between different parts of the network

• To provide network access for workgroups and users

Answer explanation

The role of the Core layer in the three-layer hierarchy network design model is to ensure data travels quickly across the network.

According to the text, what is typically used to connect devices in the Distribution layer due to its faster speed and better bandwidth?

• Coaxial cables

• Fiber links

• Ethernet cables

• Wireless connections

Answer explanation

Fiber links are typically used in the Distribution layer due to their faster speed and better bandwidth compared to other options.

Where does routing happen in the three-layer hierarchy network design model?

• At the access layer

• At the distribution layer

• At the core layer

• Between the core and access layers

Answer explanation

Routing happens at the distribution layer in the three-layer hierarchy network design model.

Why is the 3-layer hierarchy network design model considered better than other models?

• It is more expensive and complex.

• It breaks network design into smaller and more manageable parts.

• It requires more devices to function.

• It is only used in small enterprises.

Answer explanation

The 3-layer hierarchy network design model is considered better because it breaks network design into smaller and more manageable parts.

What is the role of the access layer in the 3-layer network design?

• It acts as the network backbone.

• It connects to the distribution layer directly.

• It grants end devices access to the network.

• It aggregates traffic from all distribution layer devices.

Answer explanation

The access layer in the 3-layer network design grants end devices access to the network, serving as the entry point for devices to connect and communicate within the network.

What is the primary function of the core layer in the 3-layer network design?

• It grants access to end devices.

• It aggregates traffic from all distribution layer devices.

• It connects to the access layer directly.

• It acts as a control boundary between access and distribution layers.

Answer explanation

The primary function of the core layer is to aggregate traffic from all distribution layer devices, making it the correct choice.

Why are redundant links and devices implemented between layers in a network?

• To increase the complexity of the network.

• To decrease the network speed.

• To ensure high availability and fault tolerance.

• To reduce the number of devices needed.

Answer explanation

Redundant links and devices are implemented between layers in a network to ensure high availability and fault tolerance, not to increase complexity or decrease speed.

Which statement is true regarding redundancy requirements at the distribution layer?

• Two redundancy switches are required because it is less expensive.

• No redundancy is needed because end devices come with two NICs cards.

• Redundancy is not needed because it is expensive and takes up more space.

• Redundancy is required to connect all access layer switches directly.

Answer explanation

Redundancy is not needed because it is expensive and takes up more space.