The CRS328-4C-20S-4S+RM is a switch with 28 independent ports and a combo group. This device features twenty SFP ports, four SFP+ ports for 10G modules, and four combo ports, allowing you to choose whether to use SFP or RJ45 ports from the combo group. These ports can also be selected via software. So, if you have all eight cables plugged in, you can script which four combo ports will be active.

The device comes in a 1U rackmount case with two 100-240V power supplies with failover functionality. For management and debugging, there is an RJ45 console port available, and a mode button can be customized to execute any RouterOS commands.

The device has a "Dual Boot" feature, allowing you to choose between two operating systems - RouterOS or SwOS.