Which of the following are advantages of stacking and CSS (Cluster Switch System) technologies?

A (Correct): Stacking allows inter-chassis Ethernet Trunks to be created, improving redundancy and bandwidth.

B (Correct): Multiple switches act as a single logical device, simplifying network management.

C (Correct): Stacking increases available ports, allowing expansion without adding separate devices.

D (Correct): By enabling redundancy, stacking and CSS help prevent single points of failure in the network.

Thus, the correct answers are A, B, C, and D.