5.5.2 - Three-Tiered Network Hierarchy

Flashcards covering the key concepts and vocabulary related to the Three-Tiered Network Hierarchy.

Three-Tiered Network Hierarchy

A hierarchical model that divides a large network design into three layers: access, distribution, and core, based on the functions performed.

Access Layer

The layer in a network that allows end user devices to connect, using structured cabling, wall ports, and access points for wired and wireless access.

Distribution Layer

Also known as the aggregation layer, it provides interconnections between access blocks and the core layer, implementing traffic policies and fault tolerance.

Core Layer

The layer that provides a highly available network backbone and redundant traffic paths, facilitating data flow between access and distribution layers.

Layer 3 Switch

A device capable of routing and switching that operates on the principle of 'route once, switch many,' typically used in the distribution layer.

Star Topology

A network design where each end system connects individually to a central device, like a switch.

Full Mesh Topology

A network design where every device is interconnected with every other device, often used in the core layer for redundancy.

Collapsed Core Model

A network design that integrates the core and distribution layers into one, typically used in medium-sized networks due to scalability issues.

Quality of Service (QoS)

A feature that controls and prioritizes network traffic to ensure performance levels for different applications.

Application-Specific Integrated Circuit (ASIC)

A specialized hardware designed to perform specific tasks more efficiently than general-purpose processors, used in layer 3 switches.