In which network topology are the core and distribution layers combined into a single layer?
Two-tier topology
Mesh topology
Four-tier topology
Three-tier topology
In a two-tier network topology, the core and distribution layers are merged into a single layer called the collapsed core. This simplifies the network architecture by reducing it to two layers: the access layer and the collapsed core layer. The three-tier topology, on the other hand, separates the core, distribution, and access layers into distinct layers. Spine-leaf topology is used primarily in data centers and consists of spine and leaf switches. Mesh topology involves a network structure where each node connects to multiple other nodes, providing high redundancy. Four-tier topology is not a valid topology.
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