This object reports the interface type of a specific candidate clock source in the input source table, mirroring cnsSelInpSrcIntfType but for any configured source rather than only the currently-selected one. It lets an admin audit the mix of timing reference types available to the device, for example confirming both an Ethernet-based SyncE source and a dedicated BITS source are present for diversity, rather than two sources that share a common failure mode. Seeing every configured source report the same interface type, such as all being SyncE over the same upstream switch, would reveal a lack of true redundancy despite multiple entries existing.