Which of the following is true for Circuit Switching handling multiple…

Circuit switching is a connection-oriented switching technique. Before any data is exchanged, the network reserves a dedicated transmission path -- a physical resource -- exclusively for that connection, for its entire duration; this resource is never shared with an unrelated connection.

When circuit switching must support several simultaneous connections, this same reservation principle is applied independently to every one of them: each connection is granted its own allocated path, so N concurrent connections require N separately allocated paths rather than one link over which their data mixes or contends.

• "A single path is used and shared for all data" describes a shared, contended medium where unrelated connections' data travels over one common link at the same time -- the opposite of reserving an exclusive resource per connection.

• "It encodes all data into a single channel" describes a signal-combining/encoding operation at the transmission layer, not how a switching technique provisions distinct connections.

• "All connections are multiplexed into a single channel" describes interleaving several connections' data over one shared capacity (as with statistically multiplexed links) -- again the opposite of giving each connection its own reserved resource.

Because circuit switching reserves an independent path for every connection instead of pooling them onto one shared link, the description that matches this behaviour is that separate physical paths are allocated for each channel.