A backbone switch, also known as a core switch, is a high-performance network switch engineered to interconnect different subnets, access layer switches, or distribution layer devices within a network. Its primary role is high-speed aggregation and forwarding of massive data traffic. Positioned at. This guide provides a comprehensive comparison of Access, Distribution, and Core switches, detailing their functions, characteristics, and deployment scenarios. Rather than implementing a flat network, this model endorses a hierarchical structure, which is generally easier to manage and troubleshoot. It contains three layers: core, distribution, and access. The strategic design of a hierarchy network may comprise more than three layers. In enterprise networking, the hierarchical three-tier model is divided into three distinct roles: access switches (which connect end-user devices to the network via Layer 2), distribution switches (which route inter-VLAN traffic and enforce security policies at Layer 3), and core switches (which. A backbone network (BN) is a high- speed network that connects many networks. A backbone that connects many BNs spanning several nearby buildings for a single.