Cisco CCNP BCMSN Exam Tutorial The Core Layer Of Cisco s Three-Layer Model
Below is a MRR and PLR article in category Computers Technology -> subcategory Computer Certification.
Cisco CCNP/BCMSN Exam Tutorial: Understanding the Core Layer of Cisco's Three-Layer Model
Summary
To excel in the CCNP certification, it's essential to grasp the intricacies of each layer in Cisco's three-layer networking model. Learn these crucial details from Chris Bryant, CCIE12933.
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Introduction
As you advance from CCNA to CCNP, you'll revisit a familiar networking model?"the Cisco Three-Layer Hierarchical Model. Unlike your CCNA studies, where memorizing the layers sufficed, your CCNP requires a deeper understanding of the roles and responsibilities of each layer. This knowledge is not only critical for your exams but also for your networking career. Let's delve into the core layer and its essential functions, emphasizing practical considerations.The Core Layer Overview
The term "core switches" refers to equipment found at the core layer. These switches play a crucial role in enabling communication between distribution layer switches. They must focus solely on high-speed data transfer with minimal latency, serving as the network's backbone.Core layer switches are the network's most powerful, boasting higher throughput than any other switches. Given that every action on a Cisco router or switch consumes CPU and memory resources, heavy tasks like frame manipulation and filtering are left to other layers. An exception is Quality of Service (QoS), typically handled at the core layer. While a detailed exploration of QoS will follow in another tutorial, it involves prioritizing specific data using high-speed queuing.
Importance of Redundancy
Redundancy at the core layer is paramount. As the central hub of the network, achieving maximum fault tolerance is crucial. Additionally, this is where root bridges should reside.Avoiding Unnecessary Workload
Minimizing extra workload on core switches is critical. Future sections of this BCMSN tutorial will explore how the remaining layers manage tasks efficiently to keep the core layer optimized.By understanding these principles, you're well-equipped to tackle the CCNP and enhance your networking career.
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