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Zorluk: OrtaNetwork Topology Architectures

A network administrator is evaluating campus design options for a multi-floor office building with modest bandwidth requirements. The team decides to implement a 2-Tier Collapsed Core topology instead of a traditional 3-Tier Cisco Campus architecture. Which of the following statements accurately describe the structural and operational traits of this Collapsed Core design? (Select two.)

  1. The core and distribution layer functions are merged onto the same physical switch platform or redundant switch pair.Cevap
  2. It reduces hardware expenditure and management overhead while providing adequate scalability for smaller to medium-sized networks.Cevap
  3. C
    Access layer switches are removed entirely, requiring all end-user workstations to connect directly to routing ports on the collapsed core switches.
  4. D
    Enabling Spanning Tree PortFast on trunk links connecting access switches to the collapsed core is required to ensure rapid convergence.

Cevap

The correct statements are that the core and distribution layer functions are merged onto the same physical switch platform or redundant switch pair, and that the design reduces hardware expenditure and management overhead while providing adequate scalability for smaller to medium-sized networks.
A 2-Tier Collapsed Core architecture combines the functional responsibilities of the distribution layer (routing boundaries, policy enforcement, VLAN aggregation) and core layer (high-speed transport) into a single logical or physical layer. This approach lowers equipment expenditures, simplifies maintenance, and provides an efficient design for small-to-medium enterprise campuses.

Adım Adım Çözüm

1
Analyze the structural definition of a 2-Tier Collapsed Core architecture.
Identify that the core and distribution layers of a traditional 3-Tier model are combined into unified hardware.
This consolidation eliminates one tier of switches to simplify network complexity for smaller deployments.
2
Evaluate the financial and operational benefits of collapsing the core and distribution layers.
Recognize that fewer physical devices result in lower capital costs and simplified management.
Smaller campus environments do not generate enough inter-building aggregate traffic to justify a standalone core layer.
3
Differentiate access layer responsibilities and STP configuration rules.
Confirm that access switches remain necessary and that PortFast must not be applied to switch-to-switch trunks.
PortFast applied to switch interconnects leads to bridging loops, while access switches provide endpoint connectivity and local security enforcement.

Anahtar Kavram

Cisco 2-Tier Collapsed Core Campus Architecture
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Network Topology Architectures

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