Is CTSI a layer 2?

Excuse me, could you clarify for me whether CTSI is considered a Layer 2 solution in the blockchain ecosystem? I'm trying to get a better understanding of its place in the industry and how it might compare to other similar platforms. I've heard it mentioned in the context of scalability and transaction throughput, but I'm not entirely sure if it fits neatly into the Layer 2 category. Thank you for your help in clarifying this point.