Consideranapplicationthattransmitsdataatasteadyrate$($forexample$,$thesender generates an N$-$bit unit of data every k time units, where key is small and fixed$).$ Also, when such an application starts, it will continue running for a relatively long period of time. Answer the following questions, briefly justify your answer:a$.$ Would a packet switched network, or a circuit switched network be more appropriate for this application? Why?b$.$ Suppose that a packet switched network is used and the only traffic in this network comes from such applications as described above. Furthermore, assume that the sum of the application data rates is less than the capacities of each and every link. Is some form of congestion control needed? Why?