Question:

    - Layer-2 or Layer-3?

    - Is this a 24 port SFP switch or RJ45?

    - PoE | How many watts?

    - Multi-Gig?

    - Uplink Network Modules? 10G, 25G, etc...

    - Multiple power supplies?

    - Stacked power

Answer:

At all sites, I am looking for Layer 3 with 24 or 48 ports of RJ45, and at least a couple of SFP+ ports.

PoE+

a 10Gig uplink

And vendors decide on the multiple power supplies and whether or not they are stacked.